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Hydrology

Drought Mitigation Center: Faculty Publications

2018

Articles 1 - 9 of 9

Full-Text Articles in Physical Sciences and Mathematics

Tracking Drought Perspectives: A Rural Case Study Of Transformations Following An Invisible Hazard, Theresa Jedd, Deborah Bathke, Duane Gill, Bimal Paul, Nicole Wall, Tonya Bernadt, Jacob Peter, Anthony Mucia, Milan Wall Jun 2018

Tracking Drought Perspectives: A Rural Case Study Of Transformations Following An Invisible Hazard, Theresa Jedd, Deborah Bathke, Duane Gill, Bimal Paul, Nicole Wall, Tonya Bernadt, Jacob Peter, Anthony Mucia, Milan Wall

Drought Mitigation Center: Faculty Publications

Rural towns are especially susceptible to the effects of drought because their economies are dependent on natural resources. However, they are also resilient in many ways to natural hazards because they are rich in civic engagement and social capital. Because of the diverse nature of drought’s impacts, understanding its complex dynamics and its effects requires a multidisciplinary approach. To study these dynamics, this research combines appreciative inquiry, the Community Capitals Framework, and a range of climatological monitoring data to assess the 2012–14 Great Plains drought’s effect on McCook, Nebraska. Community coping measures, such as water-use reduction and public health programs, …

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Smap Soil Moisture Change As An Indicator Of Drought Conditions, Rajasekaran Eswar, Narendra N. Das, Calvin Christian Poulsen, Ali Behrangi, John Swigart, Mark D. Svoboda, Dara Entekhabi, Simon Yueh, Bradley Doorn, Jared Entin May 2018

Smap Soil Moisture Change As An Indicator Of Drought Conditions, Rajasekaran Eswar, Narendra N. Das, Calvin Christian Poulsen, Ali Behrangi, John Swigart, Mark D. Svoboda, Dara Entekhabi, Simon Yueh, Bradley Doorn, Jared Entin

Drought Mitigation Center: Faculty Publications

Soil moisture is considered a key variable in drought analysis. The soil moisture dynamics given by the change in soil moisture between two time periods can provide information on the intensification or improvement of drought conditions. The aim of this work is to analyze how the soil moisture dynamics respond to changes in drought conditions over multiple time intervals. The change in soil moisture estimated from the Soil Moisture Active Passive (SMAP) satellite observations was compared with the United States Drought Monitor (USDM) and the Standardized Precipitation Index (SPI) over the contiguous United States (CONUS). The results indicated that the …

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Downscaling Africa’S Drought Forecasts Through Integration Of Indigenous And Scientific Drought Forecasts Using Fuzzy Cognitive Maps, Muthoni Masinde, Mwanjele Mwagha, Tsegaye Tadesse Apr 2018

Downscaling Africa’S Drought Forecasts Through Integration Of Indigenous And Scientific Drought Forecasts Using Fuzzy Cognitive Maps, Muthoni Masinde, Mwanjele Mwagha, Tsegaye Tadesse

Drought Mitigation Center: Faculty Publications

In the wake of increased drought occurrences being witnessed in Sub-Saharan Africa, more localized and contextualized drought mitigation strategies are on the agendas of many researchers and policy makers in the region. The integration of indigenous knowledge on droughts with seasonal climate forecasts is one such strategy. The main challenge facing this integration, however, is the formal representation of highly-structured and holistic indigenous knowledge. In this paper, we demonstrate how the use of fuzzy cognitive mapping can address this challenge. Indigenous knowledge on droughts from five communities was modeled and represented using fuzzy cognitive maps. Maps from one of these …

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Validation Of New Satellite Rainfall Products Over The Upper Blue Nile Basin, Ethiopia, Getachew Tesfaye Ayehu, Tsegaye Tadesse, Berhan Gessesse, Tufa Dinku Apr 2018

Validation Of New Satellite Rainfall Products Over The Upper Blue Nile Basin, Ethiopia, Getachew Tesfaye Ayehu, Tsegaye Tadesse, Berhan Gessesse, Tufa Dinku

Drought Mitigation Center: Faculty Publications

Accurate measurement of rainfall is vital to analyze the spatial and temporal patterns of precipitation at various scales. However, the conventional rain gauge observations in many parts of the world such as Ethiopia are sparse and unevenly distributed. An alternative to traditional rain gauge observations could be satellite-based rainfall estimates. Satellite rainfall estimates could be used as a sole product (e.g., in areas with no (or poor) ground observations) or through integrating with rain gauge measurements. In this study, the potential of a newly available Climate Hazards Group Infrared Precipitation with Stations (CHIRPS) rainfall product has been evaluated in comparison …

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Precipitation Extremes In Dynamically Downscaled Climate Scenarios Over The Greater Horn Of Africa, Andualem Shiferaw, Tsegaye Tadesse, Clinton M. Rowe, Robert Oglesby Mar 2018

Precipitation Extremes In Dynamically Downscaled Climate Scenarios Over The Greater Horn Of Africa, Andualem Shiferaw, Tsegaye Tadesse, Clinton M. Rowe, Robert Oglesby

Drought Mitigation Center: Faculty Publications

This study first assesses the performance of regional climate models in the Coordinated Regional Climate Downscaling Experiment (CORDEX) in reproducing observed extreme precipitation indices over the Greater Horn of Africa (GHA) region during 1989–2005. The study then assesses projected changes in these extremes during 2069–2098 compared to 1976–2005. The Regional Climate Model (RCM) simulations are made using two RCMs, with large-scale forcing from four CMIP5 Global limate Models(GCMs) under two Representative Concentration Pathways (RCP4.5 and RCP8.5). We found that RCM simulations have reasonably captured observed patterns of moderate precipitation extreme indices (MPEI). Pattern correlation coefficients between simulated and observed MPEI …

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Comparison Of The Performance Of Six Drought Indices In Characterizing Historical Drought For The Upper Blue Nile Basin, Ethiopia, Yared Bayissa, Shreedhar Maskey, Tsegaye Tadesse, Schalk Jan Van Andel, Semu Moges, Ann Van Griensven, Dimitri Solomatine Feb 2018

Comparison Of The Performance Of Six Drought Indices In Characterizing Historical Drought For The Upper Blue Nile Basin, Ethiopia, Yared Bayissa, Shreedhar Maskey, Tsegaye Tadesse, Schalk Jan Van Andel, Semu Moges, Ann Van Griensven, Dimitri Solomatine

Drought Mitigation Center: Faculty Publications

The Upper Blue Nile (UBN) basin is less-explored in terms of drought studies as compared to other parts of Ethiopia and lacks a basin-specific drought monitoring system. This study compares six drought indices: Standardized Precipitation Index (SPI), Standardized Precipitation Evaporation Index (SPEI), Evapotranspiration Deficit Index (ETDI), Soil Moisture Deficit Index (SMDI), Aggregate Drought Index (ADI), and Standardized Runoff-discharge Index (SRI), and evaluates their performance with respect to identifying historic drought events in the UBN basin. The indices were calculated using monthly time series of observed precipitation, average temperature, river discharge, and modeled evapotranspiration and soil moisture from 1970 to 2010. …

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Factors Influencing Farmers’ Adoption Of Best Management Practices: A Review And Synthesis, Tingting Liu, Randall J. F. Bruins, Matthew T. Heberling Feb 2018

Factors Influencing Farmers’ Adoption Of Best Management Practices: A Review And Synthesis, Tingting Liu, Randall J. F. Bruins, Matthew T. Heberling

Drought Mitigation Center: Faculty Publications

Best management practices (BMPs) for reducing agricultural non-point source pollution are widely available. However, agriculture remains a major global contributor to degradation of waters because farmers often do not adopt BMPs. To improve water quality, it is necessary to understand the factors that influence BMP adoption by farmers. We review the findings of BMP adoption studies from both developed and developing countries, published after (or otherwise not included in) two major literature reviews from 2007 and 2008. We summarize the study locations, scales, and BMPs studied; the analytical methods used; the factors evaluated; and the directionality of each factor’s influence …

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Developing A Remotely Sensed Drought Monitoring Indicator For Morocco, Noureddine Bijaber, Driss El Hadani, Mariam Saidi, Mark D. Svoboda, Christopher Hain, Calvin Christian Poulsen, Mohammed Yessef, Atmane Rochdi Feb 2018

Developing A Remotely Sensed Drought Monitoring Indicator For Morocco, Noureddine Bijaber, Driss El Hadani, Mariam Saidi, Mark D. Svoboda, Christopher Hain, Calvin Christian Poulsen, Mohammed Yessef, Atmane Rochdi

Drought Mitigation Center: Faculty Publications

Drought is one of the most serious climatic and natural disasters inflicting serious impacts on the socio-economy of Morocco, which is characterized both by low-average annual rainfall and high irregularity in the spatial distribution and timing of precipitation across the country. This work aims to develop a comprehensive and integrated method for drought monitoring based on remote sensing techniques. The main input parameters are derived monthly from satellite data at the national scale and are then combined to generate a composite drought index presenting different severity classes of drought. The input parameters are: Standardized Precipitation Index calculated from satellite-based precipitation …

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Improving National And Regional Drought Early Warning Systems In The Greater Horn Of Africa, Tsegaye Tadesse, Nicole Wall, Michael Hayes, Mark Svoboda, Deborah `Bathke Jan 2018

Improving National And Regional Drought Early Warning Systems In The Greater Horn Of Africa, Tsegaye Tadesse, Nicole Wall, Michael Hayes, Mark Svoboda, Deborah `Bathke

Drought Mitigation Center: Faculty Publications

The workshop was conducted to discuss various new and existing seasonal models and experimental drought and vegetation prediction products with experts and decision-makers representing local (private, governmental, and nongovernmental organizations), regional, and international organizations in the Greater Horn of Africa (GHA). Eighty-five participants met to discuss a strategic approach for improving drought early warning and food security systems in the GHA.

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