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Proceedings of the International Association of Hydrological Sciences An open-access publication for refereed proceedings in hydrology

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Proc. IAHS, 379, 255-261, 2018
https://doi.org/10.5194/piahs-379-255-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Pre-conference publication
05 Jun 2018
Long-term changes in river system hydrology in Texas
Yiwen Zhang1 and Ralph Wurbs2 1Water Management and Hydrologic Science Program, Texas A&M University, College Station, Texas, 77840, USA
2Zachry Department of Civil Engineering, Texas A&M University, College Station, Texas, 77840, USA
Abstract. Climate change and human actives are recognized as a topical issue that change long-term water budget, flow-frequency, and storage-frequency characteristics of different river systems. Texas is characterized by extreme hydrologic variability both spatially and temporally. Meanwhile, population and economic growth and accompanying water resources development projects have greatly impacted river flows throughout Texas. The relative effects of climate change, water resources development, water use, and other factors on long-term changes in river flow, reservoir storage, evaporation, water use, and other components of the water budgets of different river basins of Texas have been simulated in this research using the monthly version of the Water Rights Analysis Package (WRAP) modelling system with input databases sets from the Texas Commission on Environmental Quality (TCEQ) and Texas Water Development Board (TWDB). The results show that long-term changes are minimal from analysis monthly precipitation depths. Evaporation rates vary greatly seasonally and for much of the state appear to have a gradually upward trend. River/reservoir system water budgets and river flow characteristics have changed significantly during the past 75 years in response to water resources development and use.
Citation: Zhang, Y. and Wurbs, R.: Long-term changes in river system hydrology in Texas, Proc. IAHS, 379, 255-261, https://doi.org/10.5194/piahs-379-255-2018, 2018.
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This research focus on developing a better understanding of long-term changes in flow of Texas and help make effective water management. Long-term alterations in flow are analyzed by HEC-DSS,IHA. WAM are performed for present conditions of water resource management. Results shown rainfall and river flows in Texas are extremely variable. Long-term trends in monthly rainfall are no significant. Evaporation rates appear to be gradually increasing. River flows are more sensitive to human activities.
This research focus on developing a better understanding of long-term changes in flow of Texas...
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