Engineering Commons^™

An Open-Source Tool To Facilitate The Processing Of Grace Observations And Gldas Outputs: An Evaluation In Bangladesh, Adam J. Purdy, Cédric H. David, Md. Safat Sikder, John T. Reager, Hrishikesh A. Chandanpukar, Norman L. Jones, Mir A. Matin

Faculty Publications

Bangladesh lies at the intersection of the Ganges, Brahmaputra, and Meghna rivers with a combined average discharge of 38,000 m3s−1 ranking fourth globally. Despite the volume of water flowing through and seasonally inundating parts of the landscape, groundwater reliance is necessary to support an intensive agricultural industry. Here we use newly-developed open-source software to combine observations from the Gravity Recovery and Climate Experiment (GRACE) satellites with hydrologic estimates of land water storage from the Global Land Assimilation Data System (GLDAS) to isolate basin-scale groundwater anomalies in Northwest Bangladesh from 2002 to 2016. We place our estimates in the context of …

The Collison Floating Evaporation Pan: Design, Validation, And Comparison, Jacob William Collison

Civil Engineering ETDs

Accurate tracking of open-water evaporative losses, one of the largest consumptive uses of water in the Southwestern USA, is increasingly important with anticipated climate shifts toward longer and more severe droughts. A new open-water evaporation technique, the Collison Floating Evaporation Pan, (CFEP), was tested on Cochiti Lake, New Mexico, USA for one year with objectives being: identify the limitations and potential solutions to evaporation techniques; deploy, test the reliability, and validity of the CFEP and evaluate uncertainties in standard evaporation techniques; and improvements over prior evaporation techniques. The CFEP provided reliable evaporation measurements during sustained winds greater than 20 m/s. …

Assessing Data Availability And Research Reproducibility In Hydrology And Water Resources, James H. Stagge, David E. Rosenberg, Adel M. Abdallah, Hadia Akbar, Nour A. Atallah, Ryan James

Civil and Environmental Engineering Faculty Publications

There is broad interest to improve the reproducibility of published research. We developed a survey tool to assess the availability of digital research artifacts published alongside peer-reviewed journal articles (e.g. data, models, code, directions for use) and reproducibility of article results. We used the tool to assess 360 of the 1,989 articles published by six hydrology and water resources journals in 2017. Like studies from other fields, we reproduced results for only a small fraction of articles (1.6% of tested articles) using their available artifacts. We estimated, with 95% confidence, that results might be reproduced for only 0.6% to 6.8% …

A Data Model To Manage Data For Water Resources Systems Modeling, Adel M. Abdallah, David E. Rosenberg

Civil and Environmental Engineering Faculty Publications

Current practices to identify, organize, analyze, and serve data to water resources systems models are typically model and dataset-specific. Data are stored in different formats, described with different vocabularies, and require manual, model-specific, and time-intensive manipulations to find, organize, compare, and then serve to models. This paper presents the Water Management Data Model (WaMDaM) implemented in a relational database. WaMDaM uses contextual metadata, controlled vocabularies, and supporting software tools to organize and store water management data from multiple sources and models and allow users to more easily interact with its database. Five use cases use thirteen datasets and models focused …

1923 - Flow In California Streams, Bulletin No. 5, Appendix A, Report To The Legislature

Miscellaneous Documents and Reports

The legislature of 1921 appropriated $200,000 for an investigation of California's water resources by the State Department of Public Works, Division of Engineering and Irrigation. Accordingly, an engineering investigation was completed and a report on California's water resources transmitted to the legislature on January 1, 1923. The report addresses the geology, precipitation and run-off in California.

1939 - A History Of The Water Resources Branch, Us Geological Survey, Volume I, From Predecessor Surveys To June 30, 1919

Miscellaneous Federal Documents & Reports

By 1938, the systematic studies of the water resources of the country and, therefore, the antecedents of the Water Resources Branch of the USGS were 50 years old. The history of the Water Resources Branch presents the struggle to reach into the unknown and, by the development of methods and instruments as well as the training of personnel to create a new art and a new science. This is Volume I of a six volume chronological summaries of the activities and achievements of the Water Resources Division of the U.S. Geological Survey.

2010 - California Agricultural Vision - Strategies For Sustainability

Miscellaneous Documents and Reports

California is a major contributor to the global food supply and to the national security of the United States. To keep pace with growing demand for food, as the world’s population continues to expand, California agriculture must remain profitable and competitive in a global market by efficiently using resources and controlling production costs. California faces unprecedented challenges to its sustainability in the form of pressures on its profitability and productivity related to water, regulations, labor, invasive species, urbanization and many other factors.

2003 - Geohydrologic Framework Of Recharge And Seawater Intrusion In The Pajaro Valley, Santa Cruz And Monterey Counties, California

Miscellaneous Monterey and San Luis Obispo County Documents and Reports

The Pajaro Valley Water Management Agency (PVWMA) must deal with issues of both water supply and water quality. Managing water resources for agricultural and municipal users requires maintaining a reliable water supply to meet growing demands while preventing ground-water overdraft and the related degradation of water quality. Important regional water-quality concerns include increased nitrate concentrations and seawater intrusion. To protect the quantity and quality of the ground-water supplies, the PVWMA has implemented a plan to prevent further seawater intrusion. In order to evaluate how these activities can be conducted most effectively, it is necessary to improve the understanding of the …

1994 - Hydrogeologic Investigation, Arroyo Seco Cone

Monterey County Water Resources Agency Engineering Reports

This report presents the findings, analysis, conclusions, and recommendations developed

as part of an investigation to characterize the hydrogeology of the Arroyo Seco Cone area of the

Salinas Valley. The purpose of this investigation is to assess the feasibility of developing a seasonal surface water spreading operation utilizing water diverted from the Arroyo Seco in order to enhance ground water recharge in the area. The goal of a project to store water in the ground for subsequent pumping and use is to increase the yield of the Salinas Basin. This investigation defines the hydrogeologic characteristics of the Arroyo Seco Cone …

1997 - Water Resources Data Report, Water Year 1994-1995

Monterey County Water Resources Agency Water Reports

California State legislation outlines the objectives and purposes of the Monterey County Water Resources Agency (MCWRA) and states that the MCWRA is to “carry on technical and other necessary investigations, make measurements, collect data, make analyses, studies and inspections pertaining to water supply, water rights, control of flood and storm waters and use of water both within and outside of the agency ...” The MCWRA is responsible for the managing, planning and engineering of the water resources of the Salinas Valley. This report was prepared in part to fulfill that responsibility.