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2014

Drought

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Full-Text Articles in Physical Sciences and Mathematics

Long Term Ground Based Precipitation Data Analysis: Spatial And Temporal Variability, Luciano Rodriguez, Cyril S. Rakovski, Hesham El-Askary, Mohamed Allali Dec 2014

Long Term Ground Based Precipitation Data Analysis: Spatial And Temporal Variability, Luciano Rodriguez, Cyril S. Rakovski, Hesham El-Askary, Mohamed Allali

Student Scholar Symposium Abstracts and Posters

California is an area of diverse topography and has what many scientists call a Mediterranean climate. Various precipitation patterns exist due to El Niño Southern Oscillation (ENSO) which can cause abnormal precipitation or droughts. As temperature increases mainly due to the increase of CO2 in the atmosphere, it is rapidly changing the climate of not only California but the world. An increase in temperature is leading to droughts in certain areas as other areas are experiencing heavy rainfall/flooding. Droughts in return are providing a foundation for fires harming the ecosystem and nearby population. Various natural hazards can be induced due …

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Identification Of Groundwater Sources For Municipal Wells Using Geochemical Data On The Platte Alluvial Aquifer And Underlying Limestone At The Lincoln Water Well Field Near Ashland Nebraska, Juanita Cruz Torres Dec 2014

Identification Of Groundwater Sources For Municipal Wells Using Geochemical Data On The Platte Alluvial Aquifer And Underlying Limestone At The Lincoln Water Well Field Near Ashland Nebraska, Juanita Cruz Torres

Department of Earth and Atmospheric Sciences: Dissertations, Theses, and Student Research

Alluvial aquifer systems where pumping of municipal wells induces recharge from the adjacent river are the primary source of water for many cities. The city of Lincoln, NE has a primary water source in an alluvial aquifer adjacent to the Platte River. The Lincoln Water System manages the stream/aquifer system by using integrated models for a better understanding during periods of high stress such as a drought. The integrated models set the limestone aquifer as an impermeable boundary to understand the alluvial aquifer system without having a secondary water source. The limestone aquifer is permeable and the purpose of this …

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Data-Driven Diagnostics Of Terrestrial Carbon Dynamics Over North America, Jingfeng Xiao, Scott V. Ollinger, Steve Frolking, George C. Hurtt, David Y. Hollinger, Kenneth J. Davis, Yude Pan, Xiaoyang Zhang, Feng Deng, Jiquan Chen, Dennis D. Baldocchi, Bevery E. Law, M. Altaf Arain, Ankur R. Desai, Andrew D. Richardson, Ge Sun, Brian Amiro, Hank Margolis, Lianhong Gu, Russell L. Scott, Peter D. Blanken, Andrew E. Suyker Oct 2014

Data-Driven Diagnostics Of Terrestrial Carbon Dynamics Over North America, Jingfeng Xiao, Scott V. Ollinger, Steve Frolking, George C. Hurtt, David Y. Hollinger, Kenneth J. Davis, Yude Pan, Xiaoyang Zhang, Feng Deng, Jiquan Chen, Dennis D. Baldocchi, Bevery E. Law, M. Altaf Arain, Ankur R. Desai, Andrew D. Richardson, Ge Sun, Brian Amiro, Hank Margolis, Lianhong Gu, Russell L. Scott, Peter D. Blanken, Andrew E. Suyker

GSCE Faculty Publications

The exchange of carbon dioxide is a key measure of ecosystem metabolism and a critical intersection between the terrestrial biosphere and the Earth's climate. Despite the general agreement that the terrestrial ecosystems in North America provide a sizeable carbon sink, the size and distribution of the sink remain uncertain. We use a data-driven approach to upscale eddy covariance flux observations from towers to the continental scale by integrating flux observations, meteorology, stand age, aboveground biomass, and a proxy for canopy nitrogen concentrations from AmeriFlux and Fluxnet-Canada Research Network as well as a variety of satellite data streams from the MODIS …

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Evidence Of Enso Mega-Drought Triggered Collapse Of Prehistory Aboriginal Society In Northwest Australia, Hamish Mcgowan, Samuel K. Marx, P Moss, Andrew Hammond Aug 2014

Evidence Of Enso Mega-Drought Triggered Collapse Of Prehistory Aboriginal Society In Northwest Australia, Hamish Mcgowan, Samuel K. Marx, P Moss, Andrew Hammond

Samuel K Marx

The Kimberley region of northwest Australia contains one of the World's largest collections of rock art characterised by two distinct art forms; the fine featured anthropomorphic figures of the Gwion Gwion or Bradshaw paintings, and broad stroke Wandjina figures. Luminescence dating of mud wasp nests overlying Gwion Gwion paintings has confirmed an age of at least 17,000 yrs B.P. with the most recent dates for these paintings from around the mid-Holocene (5000 to 7000 yrs B.P.). Radiocarbon dating indicates that the Wandjina rock art then emerged around 3800 to 4000 yrs B.P. following a hiatus of at least 1200 yrs. …

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A Case Study Of Changing Cropping Diversity And Agricultural Risk In The Doulthabad Mandal Of Telangana State In India, Srikanth Kondabolu Aug 2014

A Case Study Of Changing Cropping Diversity And Agricultural Risk In The Doulthabad Mandal Of Telangana State In India, Srikanth Kondabolu

School of Natural Resources: Dissertations, Theses, and Student Research

The Doulthabad[1] Mandal is a hot semi-arid agro-ecological sub-region (Rao et al. 2006) located in Mahbubnagar District on the North Telangana Plateau in the state of Telangana. Agriculture is the main occupation in this region, which is populated mostly with small and marginal farmers. This study uses the time period from 1971 to 2004 to study the variation in cropping pattern diversity and distribution of rainfall during the monsoons and understand the implications on production risk in agriculture. Quantitative methods were used in determining the changes in rainfall while qualitative methods were used to study cropping system changes. The …

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A Complex Adaptive Systems Approach To Simulate Interactions Among Water Resources, Decision-Makers, And Consumers And Assess Urban Water Sustainability, Alireza Mashhadi Ali, M. Ehsan Shafiee, Sankarasubramanian Arumugam, Emily Zechman Berglund Aug 2014

A Complex Adaptive Systems Approach To Simulate Interactions Among Water Resources, Decision-Makers, And Consumers And Assess Urban Water Sustainability, Alireza Mashhadi Ali, M. Ehsan Shafiee, Sankarasubramanian Arumugam, Emily Zechman Berglund

International Conference on Hydroinformatics

The balance between water supply and demand for urban water resources is threatened by population growth, land use changes, and climate change. Interactions among environmental resources, infrastructure, societal norms, and management decisions create complexity and increase the unpredictability of the dynamics of water availability. This research develops a sociotechnical framework to simulate interactions among technical and social systems and assess urban water sustainability. An agent-based model (ABM) is implemented to simulate a community of heterogeneous households as agents. The ABM is coupled with a hydrological watershed model, a water reservoir model, and climate change projections. The increase in the number …

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Analysis Of Semi-Distributed And Global Hydrological Models In The Central Tropical Basins Of The Gulf Of Mexico To The Effects Of Extreme Hydrometeorological Phenomena, Sara Patricia Ibarra Zavaleta, Mariana Castañeda González, Rabindranarth Romero López, Eduardo Castillog Onzalez, Alberto Brando Báez Camarena, Annie Poulin, Mathias Glaus, Robert Hausler Aug 2014

Analysis Of Semi-Distributed And Global Hydrological Models In The Central Tropical Basins Of The Gulf Of Mexico To The Effects Of Extreme Hydrometeorological Phenomena, Sara Patricia Ibarra Zavaleta, Mariana Castañeda González, Rabindranarth Romero López, Eduardo Castillog Onzalez, Alberto Brando Báez Camarena, Annie Poulin, Mathias Glaus, Robert Hausler

International Conference on Hydroinformatics

In the last years extreme hydrometeorological phenomena have increased in number and intensity affecting the inhabitants of various regions, an example of these effects are the central basins of the Gulf of Mexico (CBGM) that they have been affected by 55.2% with floods and especially the state of Veracruz (1999-2013), leaving economic, social and environmental losses. Mexico currently lacks sufficient hydrological studies for the measurement of volumes in rivers, since is convenient to create a hydrological model (HM) suited to the quality and quantity of the geographic and climatic information that is reliable and affordable. Therefore this research compares the …

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The Effect Of Flood Reduction And Water Conservation Of Decentralized Rainwater Management System, Dong Geun Kwak, Moo Young Han Aug 2014

The Effect Of Flood Reduction And Water Conservation Of Decentralized Rainwater Management System, Dong Geun Kwak, Moo Young Han

International Conference on Hydroinformatics

Climate change and increase of surface runoff by urbanization caused the urban flooding. Therefore, a sustainable new paradigm is required to recover sound water circulation and overcome the limitations of the existing water management system vulnerable to flooding. Recently Rainwater management is widely known and its legal obligation is strengthened to improve the control capacity for flooding reduction and water conservation in urban areas. Multipurpose DRMS(Decentralized Rainwater Management System) is a new paradigm proposed and recommended by NEMA(National Emergency Management Agency) for both flood control and water conservation. In this study, a flood prone area in Suwon of South Korea …

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Reconstruction Of Paleo-Hydrologic Data For Vulnerability Assessment Of Water Resources Systems, Saman Razavi, Amin Elshorbagy, Howard Wheater, David Sauchyn Aug 2014

Reconstruction Of Paleo-Hydrologic Data For Vulnerability Assessment Of Water Resources Systems, Saman Razavi, Amin Elshorbagy, Howard Wheater, David Sauchyn

International Conference on Hydroinformatics

Tree-ring chronologies are a rich source of information of past climate-driven non-stationarities in hydrologic variables. They are typically directly related to available water in respective years, thereby providing a basis for paleo-hydrology reconstruction. This study investigates the time series of tree-ring chronologies, with the objective of identifying the spatiotemporal patterns and extents of non-stationarities, which are essentially representations of past “climate changes”. This study also generates ensembles of moving-average streamflow time series for the centuries prior to the period of observational record. The major headwater tributaries of the Saskatchewan River basin (SaskRB), the main source of surface water in the …

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Remote Sensing Of Total Water Storage Variability During Extreme Heat Waves, José Agustín Breña-Naranjo, Adrián Pedrozo-Acuña Aug 2014

Remote Sensing Of Total Water Storage Variability During Extreme Heat Waves, José Agustín Breña-Naranjo, Adrián Pedrozo-Acuña

International Conference on Hydroinformatics

Droughts and heat waves are a major hazard for food & water security, economic development, and human & ecosystem health, among others. Over the last decade, short-term but exceptional heat waves have been observed across different regions of the world, with several locations experiencing all-time maximum temperature records. While many studies have suggested that the extreme intensity of such recent events can be attributed to a changing climate, little attention has been given to the impacts on the terrestrial water balance. This work analyzes the sensitivity of total water storage to extreme heat waves since 2003 in Europe (2003), Russia, …

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Quantifying Gcm Simulation Uncertainty And Incorporating Into Water Resources Assessment, Fitsum Markos Woldemeskel, Ashish Sharma, Bellie Sivakumar, Rajeshwar Mehrotra Aug 2014

Quantifying Gcm Simulation Uncertainty And Incorporating Into Water Resources Assessment, Fitsum Markos Woldemeskel, Ashish Sharma, Bellie Sivakumar, Rajeshwar Mehrotra

International Conference on Hydroinformatics

Rainfall and temperature, simulated using Global Climate Models (GCMs), serve as key inputs for hydrological models in studying catchment responses to climate scenarios. GCM simulations of rainfall and temperature, however, are uncertain due to model structure, scenarios and initial conditions, which results in biased outcomes if used for hydrological models without due consideration of the uncertainties. In this study, we develop a novel uncertainty metric, square root error variance (SREV), to quantify uncertainties involved in GCM rainfall and temperature simulations as well as illustrate its application for water resources assessment. The uncertainty metric involves converting multiple GCM simulations into their …

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Analysis On Runoff Characteristics Of Decentralized Rainwater Management System Using Xp-Swmm Simulation, Yun Jung Kim, Dong Geun Kwak, Won Tae Kim, Hai Uk Nam, Jeong Joo Kim, Hee Chul Yoon, Hyun Bae Kim, Ho Sun Lee Aug 2014

Analysis On Runoff Characteristics Of Decentralized Rainwater Management System Using Xp-Swmm Simulation, Yun Jung Kim, Dong Geun Kwak, Won Tae Kim, Hai Uk Nam, Jeong Joo Kim, Hee Chul Yoon, Hyun Bae Kim, Ho Sun Lee

International Conference on Hydroinformatics

In recent years, impervious areas are increasing in residential zone as well as unsettled area with rapid urbanization and land use. Consequently, this phenomenon influences weak urban environmental compositions about climate change including urban flooding accidents. Therefore, a new paradigm on rainwater management is needed for sound and sustainable restoration of hydrological circulation. Recently, a novel rainwater management system has been developed and recommended for irrigation and flood control in Korea. Especially, P city is now planning a new rainwater management system adopting LID (Low Impact Development) techniques on a small scale development area. In this study, XP-SWMM was used …

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Impact Of El Niño Southern Oscillation On Monsoon Rainfall In Bhima Basin, Central India, Dhyan Singh Arya, Mohamed Gareeballa Abdall, Asmita Ramkrishna Murumkar Aug 2014

Impact Of El Niño Southern Oscillation On Monsoon Rainfall In Bhima Basin, Central India, Dhyan Singh Arya, Mohamed Gareeballa Abdall, Asmita Ramkrishna Murumkar

International Conference on Hydroinformatics

The analysis of the effects of ENSO phenomenon on monsoon rainfall of the Bhima River basin located in Central India was investigated using 10x10 degree gridded monsoon rainfall during 1951-2003 and data of four ENSO indices (SOI, MEI, Niño 3.4 and DMI). Data of ENSO indices were divided into three seasons and only statistically significantly correlation was found between monsoon rainfall and monsoon season ENSO indices. Analysis also shows that the monsoon rainfall is positively correlated with SOI index whereas negatively correlated with all other indices. A significant change in the regional climate after 1976 has been reported in many …

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The Application Of A Dynamic Openmi Coupling Between A Regional Climate Model And A Distributed Surface Water-Groundwater Model, Michael Brian Butts, Martin Drews, Morten Andreas Dahl Larsen, Sara Lerer, Søren Højmark Rasmussen, Jesper Grooss, Jesper Overgaard, Jens Christian Refsgaard Aug 2014

The Application Of A Dynamic Openmi Coupling Between A Regional Climate Model And A Distributed Surface Water-Groundwater Model, Michael Brian Butts, Martin Drews, Morten Andreas Dahl Larsen, Sara Lerer, Søren Højmark Rasmussen, Jesper Grooss, Jesper Overgaard, Jens Christian Refsgaard

International Conference on Hydroinformatics

The understanding of interactions between the atmosphere, the land surface and the subsurface hydrology plays a key role in ensuring sustainable development of water resources and terrestrial ecosystems. The evaluation of climate adaptation measures requires the ability to reliably simulate the impact of different anthropogenic effects such as changes in land use, interventions such as reservoirs for flood control and irrigation, conjunctive use of surface water and groundwater under projections of future climatic conditions and variability. The interaction between climate and groundwater are often neglected in climate models and climate assessment and few studies have investigated how groundwater systems will …

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Integrated Urban Water Resources Modeling In A Semi-Arid Mountainous Region Using A Cyber-Infrastructure Framework, Erfan Goharian, Steven J. Burian Aug 2014

Integrated Urban Water Resources Modeling In A Semi-Arid Mountainous Region Using A Cyber-Infrastructure Framework, Erfan Goharian, Steven J. Burian

International Conference on Hydroinformatics

Water resources management in cities is facing growing challenges related to increases in water demand, uncertain future climate variability, and conflicts related to water rights and access. Integrated water resource management (IWRM) is an inter-disciplinary framework which connects separated infrastructures and elements of a water resource system together which have dynamic interconnection. An IWRM process broadly involves water supply systems, stormwater management, wastewater collection, climate variables, groundwater and other water related sectors to solve the water and environmental problems. In this study, an integrated framework applying the GoldSim Monte-Carlo simulation software is presented to provide dynamic simulation of inter-related parts …

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An Analysis Of Discharge And Water Level Changes Due To Weir (In The Case Of The Waegwan And Nakdong Station In South Korea), Yonghyeon Gwon, Dongseop Lee, Dohyun Kim, Sungeun Jung, Seungkwon Jung, Hosun Lee Aug 2014

An Analysis Of Discharge And Water Level Changes Due To Weir (In The Case Of The Waegwan And Nakdong Station In South Korea), Yonghyeon Gwon, Dongseop Lee, Dohyun Kim, Sungeun Jung, Seungkwon Jung, Hosun Lee

International Conference on Hydroinformatics

ABSTRACT Our country, Korea, lacks the per capita water endowment because of the high population density and geographical characteristics. Therefore, The 4 Rivers Project has been promoted since 2009. In order to control effectively drought or floods caused by abnormal climate and strong rainfall in summer, it was done and completed in 2013. The Nakdong River is the longest in the 4 Rivers Project, which it was conducted among the country's major rivers, and a lot of hydraulic structures were installed. we selected Nakdong and Weagwan stations which are located in the Nakdong River. Because the change was smaller there …

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Economical And Systematical Evaluation On Rainfall Harvesting System (Case Study : Rainfall Harvesting System Designed In Taebaek City, Republic Of Korea), Seungkwon Jung, Changdeok Jang, Jiwon Jung, Hosun Lee, Yonghyeon Gwon Aug 2014

Economical And Systematical Evaluation On Rainfall Harvesting System (Case Study : Rainfall Harvesting System Designed In Taebaek City, Republic Of Korea), Seungkwon Jung, Changdeok Jang, Jiwon Jung, Hosun Lee, Yonghyeon Gwon

International Conference on Hydroinformatics

Recently, climate change has caused drought to become more frequent and is becoming one of the serious natural disasters, resulting damages in infrastructure facilities, economy and private property losses etc. Taebaek city of Gangwon-do lies in the northeast Korean Peninsula along the steep mountain slopes, all the way to the sea. Thu, this city exhibit the Marine Climatic Characteristics. During the past 10 years, the average rainfall of Taebaek city is 849.9mm/year, which is less than the average rainfall for the whole country (1,274mm/year). This research is still ongoing. The next assessment will be on the construction cost of rainfall …

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Effect Of Sediment Releasing Operation From Reservoir Outlets On The Water Treatment Plant Downstream, Jihn-Sung Lai, Fong-Zuo Lee, Cheng-Chia Huang, Gwo-Wen Hwang, Shang-Shu Shih, Wen-Da Guo, Chia-Hui Chou, Yih-Chi Tan Aug 2014

Effect Of Sediment Releasing Operation From Reservoir Outlets On The Water Treatment Plant Downstream, Jihn-Sung Lai, Fong-Zuo Lee, Cheng-Chia Huang, Gwo-Wen Hwang, Shang-Shu Shih, Wen-Da Guo, Chia-Hui Chou, Yih-Chi Tan

International Conference on Hydroinformatics

With steep slope and strong rainfall intensity, landslide and debris flow could generate huge amount of sediment yield from the watershed, typically during typhoon floods in Taiwan. As such huge amount of sediment moved into a reservoir, serious sedimentation problem reduced storage of reservoir due to decrease of flow velocity and without sufficient sediment releasing bottom outlet. As a result, using flood discharge to release sediment during Typhoon or rain fall duration is very important. This study adopts the data of field observation from outlet structures of the Shihmen reservoir to establish the operational strategies of sediment releasing rule and …

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Vulnerability Assessment On Water Management For Climate Change Adaptation : Case Study To Gochang County In South Korea, Namjung Jang, Seounghyun Im, Hyun-Han Kwon, Sang-Woo Park, Dong-Heui Kwak Aug 2014

Vulnerability Assessment On Water Management For Climate Change Adaptation : Case Study To Gochang County In South Korea, Namjung Jang, Seounghyun Im, Hyun-Han Kwon, Sang-Woo Park, Dong-Heui Kwak

International Conference on Hydroinformatics

Currently, 1.6 billion people live in countries and regions with absolute water scarcity and the number is expected to rise to 2.8 billion people by 2025(World Bank). Climate change will make water security more difficult and costly to achieve. Smart Water Management of water resources using an integrated approach with IT (Information Technology) will play a critical role in adapting climate change and mitigate social, economic and environmental impacts. Gochang County in Jeonbuk Province (South Korea) is one of the vulnerable areas to climate change, because it is a particularly high dependency to agricultural industry, increasing proportion of elderly people, …

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Hydrological Impacts Of Climate Change – Challenges, Uncertainty And Limitations, Shreedhar Maskey, Yurong Hu, Anshul Agarwal, Dinesh Bhatt Aug 2014

Hydrological Impacts Of Climate Change – Challenges, Uncertainty And Limitations, Shreedhar Maskey, Yurong Hu, Anshul Agarwal, Dinesh Bhatt

International Conference on Hydroinformatics

How climate change impacts water resources in the future is an important question that all hydrologists want to have an answer. Climate prediction scenarios are available from many Global Circulation Models for the 21st century. These prediction datasets are typically used as input to a hydrological model for simulating impacts on hydrology, particularly river runoff, evaporation, and storage changes. Because hydrological models are usually run on a much smaller resolutions than climate models, the climate prediction datasets are usually downscaled to represent local climate for using in a hydrological model. The uncertainty in the GCMs, downscaling and hydrological models makes …

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Water Resources Policy Development Using Hydrologic And Systems Dynamics Modeling – A Case Study For East Africa, Lauren Gies, Buyung Agusdinata, Venkatesh Merwade Aug 2014

Water Resources Policy Development Using Hydrologic And Systems Dynamics Modeling – A Case Study For East Africa, Lauren Gies, Buyung Agusdinata, Venkatesh Merwade

International Conference on Hydroinformatics

Drought is a natural disaster that affects millions of people across the globe. Lack of rainfall reduces crop yields and livestock productivity and in turn, food availability and income. In developing countries, these effects are even more detrimental. As droughts become more frequent, adaptation is a fundamental concern for countries and their policy makers. Hydrologic and system dynamics models were developed for a region in East Africa, focused on the Horn of Africa (ie. a region bordering Kenya, Somalia, and Ethiopia), an area well-known for frequent droughts due to unpredictable rainfall and high temperatures. The models simulate the interdependencies between …

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Delaware Reservoirs’ Drought Risk Assessment: A Paleo View, Naresh Devineni, Gokce Ceylan Aug 2014

Delaware Reservoirs’ Drought Risk Assessment: A Paleo View, Naresh Devineni, Gokce Ceylan

International Conference on Hydroinformatics

The Delaware River provides half of New York City's drinking water, is a habitat for wild trout, American shad and the federally endangered dwarf wedge mussel. It has suffered four 100‐year floods in the last seven years. A drought during the 1960s stands as a warning of the potential vulnerability of the New York City area to severe water shortages if a similar drought were to recur. The water releases from three New York City dams on the Delaware River's headwaters impact not only the reliability of the city’s water supply, but also the potential impact of floods, and the …

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Long-Term Effects Of River Bed Variations Downstream Of The Shihmen Reservoir Due To Climate Change, Cheng-Chia Huang, Jihn-Sung Lai, Fong-Zuo Lee, Sheen-Yeong Kang, Shang-Shu Shih, Gwo-Wen Hwang, Gwo-Fong Lin Aug 2014

Long-Term Effects Of River Bed Variations Downstream Of The Shihmen Reservoir Due To Climate Change, Cheng-Chia Huang, Jihn-Sung Lai, Fong-Zuo Lee, Sheen-Yeong Kang, Shang-Shu Shih, Gwo-Wen Hwang, Gwo-Fong Lin

International Conference on Hydroinformatics

Most rivers in Taiwan are suffered from serious sedimentation problems due to extreme weather in recent years. In order to decrease sediment trap in Shihmen Reservoir, the reservoir sediment was effluent into downstream river during flood period. The river sediment deposition and erosion would be thus more violent. The quasi-two dimensional model, NETSTARS, was applied to investigate hydraulic characteristics and corresponding river sedimentation behavior in Da-Han basin. The model was calibrated and verified with field survey data and then was utilized to predict the spatial and temporal variations of downstream suspended solid concentration. Through investigating the change of suspended solid …

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Investigating The Sources Of Fresh Water Affecting The Hydrological Balance Of Lakes Enriquillo And Azuei (Hispaniola) – Data Analysis, Daniel Comarazamy, Jorge Gonzalez, Fred Moshary, Michael Piasecki, Mahrokh Moknatian, John Ibsen Aug 2014

Investigating The Sources Of Fresh Water Affecting The Hydrological Balance Of Lakes Enriquillo And Azuei (Hispaniola) – Data Analysis, Daniel Comarazamy, Jorge Gonzalez, Fred Moshary, Michael Piasecki, Mahrokh Moknatian, John Ibsen

International Conference on Hydroinformatics

The Enriquillo and Azuei are saltwater lakes located in a closed water basin in the southwestern region of the island of La Hispaniola, these have been experiencing dramatic changes in total lake-surface area coverage during the period 1980-2012. The size of Lake Enriquillo presented a surface area of approximately 276 km2 in 1984, gradually decreasing to 172 km2 in 1996. The surface area of the lake reached its lowest point in the satellite observation record in 2004, at 165 km2. Then the recent growth of the lake began reaching its 1984 size by 2006. Based on surface area measurement for …

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Change In Depletion Curve Under Projected Climatic Scenarios For A Snow Covered Catchment In Arunachal Himalaya (India), Arnab Bandyopadhyay, Aditi Bhadra, Tobom Rukbo, Sanayanbi Hodam Aug 2014

Change In Depletion Curve Under Projected Climatic Scenarios For A Snow Covered Catchment In Arunachal Himalaya (India), Arnab Bandyopadhyay, Aditi Bhadra, Tobom Rukbo, Sanayanbi Hodam

International Conference on Hydroinformatics

Snow cover depletion curve (SDC) is very much required for snowmelt runoff modeling in any snow-dominated catchment. The present study deals with the change in depletion curve of snow covered Nuranang river basin of Arunachal Pradesh under A1B, A2 (High carbon emission), B1 (Low carbon emission) and IPCC commitment projected climatic scenarios. Snow covered area (SCA) percentages were determined by using NDSI model. The temperature change under different scenarios shows that A1B climatic scenario has the highest incremental temperature change. Under IPCC commitment scenario, as the temperature and precipitation are expected to be restored to present condition after some years, …

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Evaluation Of Decision Making Methods For Integrated Water Resource Management Under Uncertainty, Thomas Peter Roach, Zoran Kapelan, Michelle Ledbetter, Ben Gouldby, Steven Wade, Ralph Ledbetter Aug 2014

Evaluation Of Decision Making Methods For Integrated Water Resource Management Under Uncertainty, Thomas Peter Roach, Zoran Kapelan, Michelle Ledbetter, Ben Gouldby, Steven Wade, Ralph Ledbetter

International Conference on Hydroinformatics

Water companies and utilities in the UK are required to produce Water Resource Management Plans (WRMPs) every five years that outline their future strategies for maintaining a secure water supply to meet anticipated demand levels. Regulatory frameworks differ around the world but in most countries similar plans are developed under the auspices of Integrated Water Resources Management (IWRM) programmes. The plans justify new demand management and water supply infrastructure needed and validate management decisions. One of the greatest problems now facing decision makers in the water industry are the increasing uncertainties in the variables used in estimating the supply and …

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Impact Of Urbanization On Spatial And Temporal Variation Of Rainfall In Beijing Over The Last 50 Years, Xiao-Meng Song, Jian-Yun Zhang, Guo-Qing Wang, Yunqing Xuan Aug 2014

Impact Of Urbanization On Spatial And Temporal Variation Of Rainfall In Beijing Over The Last 50 Years, Xiao-Meng Song, Jian-Yun Zhang, Guo-Qing Wang, Yunqing Xuan

International Conference on Hydroinformatics

Rainfall is one of the key terms involved in many hydrological processes, and it is particularly important in the field of urban hydrology. It is well known that urbanization can have potential impact on precipitation process due to the changes it causes to the ground roughness, thermal-dynamics and many other factors. In this study, the focus is set on the impact on the precipitation patterns in Beijing in term of spatial and temporal variation, from the urbanization over last 50 years in which time the fast and continuous expansion of the city at dramatic scales, the rapid growth of residents …

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Predicting The Impact Of Climate Change On Pipe Failure In Drinking Water Distribution Systems., Bas Wols, Peter Van Thienen Aug 2014

Predicting The Impact Of Climate Change On Pipe Failure In Drinking Water Distribution Systems., Bas Wols, Peter Van Thienen

International Conference on Hydroinformatics

Underground water infrastructure is designed to withstand a variability of forces during its lifetime before failure occurs. As a result of variations in loads on and deterioration of the pipe, early failures may occur. Climate change may accelerate or decelerate these processes. A statistical analysis is therefore performed to study correlations between weather parameters and pipe failure rates in the drinking water distribution systems (DWDS) of the Netherlands. The strongest correlations were found between pipe failure rates and temperature. Failure rates in asbestos cement (AC) and small diameter steel pipes increase during warm periods, which often also show higher water …

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Evaluating Climate Change Scenarios For Regional Hydrological Management In Mountainous Semi-Arid Environments, Agustín Millares, Javier Herrero, Cristina Aguilar, María José Polo Aug 2014

Evaluating Climate Change Scenarios For Regional Hydrological Management In Mountainous Semi-Arid Environments, Agustín Millares, Javier Herrero, Cristina Aguilar, María José Polo

International Conference on Hydroinformatics

Snow processes play a relevant role in semi-arid mountainous basins where snowmelt dynamics conditions the availability of water resources. In such environments, many rivers flow during the dry season due to the water storage in the snow cover while heavy rainfall events sporadically trigger severe flood events. These particularities confer to these areas special interest due to their high sensitivity in the hydrological response against changes in the meteorological conditions. This issue could be critical in many regions of the world linked to semi-arid mountain areas (e.g., the Atlas Mountains, Andean Cordillera,…) and presents a real challenge for future modifications …

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Propagation Characteristics Of Density Currents And Implications To Pollutant Transport In A Stratified Reservoir, Xin Sun, Yan Xu, Tinglin Huang, Xiao Tang Aug 2014

Propagation Characteristics Of Density Currents And Implications To Pollutant Transport In A Stratified Reservoir, Xin Sun, Yan Xu, Tinglin Huang, Xiao Tang

International Conference on Hydroinformatics

With global warming, the frequency and intensity of extreme rainfall events were predicted to change more dramatically in the near future while the amount of total precipitation will change slightly. Large volume of turbid inflow will enter the source water reservoir after a heavy rainfall, and evolve in various types of density currents depending on the density difference between the inflow and background water. Density currents play an important role in the thermal structure and pollutant transport in the reservoir. Understanding the behaviors of density current is fundamental to study the changes of source water quality during the flooding season. …

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