The Experts below are selected from a list of 312 Experts worldwide ranked by ideXlab platform

Ralph A. Wurbs - One of the best experts on this subject based on the ideXlab platform.

  • River Flows for Alternative Conditions of Water Resources Development
    Journal of Hydrologic Engineering, 2011
    Co-Authors: Ralph A. Wurbs, Tae Jin Kim
    Abstract:

    The Texas water availability modeling (WAM) system consists of the water rights analysis package (WRAP) river/reservoir system simulation model, which is generalized for application any place in the world, and WRAP input data sets for all of the river Basins of Texas. The WRAP/WAM system combines historical natural river Basin Hydrology with specified scenarios of water resources development, management, and use. Multiple-year sequences of monthly river flows for natural and alternative conditions of development are simulated. The paper compares flow-frequency statistics for nine major Texas rivers under natural and current conditions. The WRAP modeling system was recently expanded to provide flexible additional capabilities to develop stream flows representing various other user-specified conditions. An investigation of the Brazos River Basin demonstrates the new methodologies for adjusting river flows to reflect specified water management scenarios of interest.

  • modeling river reservoir system management water allocation and supply reliability
    Journal of Hydrology, 2005
    Co-Authors: Ralph A. Wurbs
    Abstract:

    The state of Texas has implemented a modeling system for assessing the availability and reliability of water resources that consists of a generalized simulation model called the Water Rights Analysis Package (WRAP) and input datasets for the state's 23 river Basins. Reservoir/river system management and water allocation practices are simulated using historical naturalized monthly streamflow sequences to represent Basin Hydrology. Institutional systems for allocating streamflow and reservoir storage resources among numerous water users are considered in detail in evaluating Basinwide impacts of water management decisions. The generalized WRAP model is a flexible tool that may be applied to river Basins anywhere. The Texas experience in implementing a statewide modeling system illustrates issues that are relevant to water management in many other regions of the world.

  • Modeling river/reservoir system management, water allocation, and supply reliability
    Journal of Hydrology, 2004
    Co-Authors: Ralph A. Wurbs
    Abstract:

    The state of Texas has implemented a modeling system for assessing the availability and reliability of water resources that consists of a generalized simulation model called the Water Rights Analysis Package (WRAP) and input datasets for the state's 23 river Basins. Reservoir/river system management and water allocation practices are simulated using historical naturalized monthly streamflow sequences to represent Basin Hydrology. Institutional systems for allocating streamflow and reservoir storage resources among numerous water users are considered in detail in evaluating Basinwide impacts of water management decisions. The generalized WRAP model is a flexible tool that may be applied to river Basins anywhere. The Texas experience in implementing a statewide modeling system illustrates issues that are relevant to water management in many other regions of the world.

  • Modelling river Basin management: an institutional perspective
    International Journal of Water Resources Development, 2003
    Co-Authors: Ralph A. Wurbs
    Abstract:

    Implementation of a water availability modelling system for the 23 river Basins of Texas illustrates key institutional aspects of this type of effort. Water supply capabilities depend upon institutional considerations such as water rights, contractual arrangements and reservoir project ownership, as well as river Basin Hydrology. A water management community must work together to develop decision support tools to help manage water resources shared by numerous water users. The Water Rights Analysis Package model adopted by the state of Texas and the lessons learned in its application are applicable to river Basin management world-wide.

Jun Magome - One of the best experts on this subject based on the ideXlab platform.

  • Challenges of hydrological analysis for water resource development in semi-arid mountainous regions: case study in Iran
    Hydrological Sciences Journal, 2014
    Co-Authors: Shiro Hishinuma, Kuniyoshi Takeuchi, Jun Magome
    Abstract:

    AbstractThis study modified the BTOPMC (Block-wise TOPMODEL with the Muskingum-Cunge routing method) distributed hydrological model to make it applicable to semi-arid regions by introducing an adjustment coefficient for infiltration capacity of the soil surface, and then applied it to two catchments above the dams in the Karun River Basin, located in semi-arid mountain ranges in Iran. The application results indicated that the introduced modification improved the model performance for simulating flood peaks generated by infiltration excess overland runoff at a daily time scale. The modified BTOPMC was found to fulfil the need to reproduce important signatures of Basin Hydrology for water resource development, such as annual runoff, seasonal runoff, low flows and flood flows. However, it was also very clear that effective model use was significantly constrained by the scarcity of ground-gauged precipitation data. Considerable efforts to improve the precipitation data acquisition should precede water resour...

  • investigation of the mekong river Basin Hydrology for 1980 2000 using the yhym
    Hydrological Processes, 2008
    Co-Authors: Hapu Arachchige Prasantha Hapuarachchi, Kuniyoshi Takeuchi, Maichun Zhou, Anthony S Kiem, Mikhail Georgievski, Jun Magome, Hiroshi Ishidaira
    Abstract:

    This study investigates the Mekong River Basin Hydrology for the 1980–2000 period using a grid-based distributed hydrological model called Yamanashi Hydrological Model (YHyM). The performance of the model is evaluated using data observed at different locations and the results justify the physical soundness of the model. The seasonal variations of climatic and hydrological characteristics of the Basin such as soil moisture, ground water saturation deficit, runoff, precipitation, evapotranspiration, etc. are analysed. On the basis of the simulated results, it is noticeable that there is no significant trend in the precipitation, discharge, or soil moisture state of the Basin during the simulated period, though there are some seasonal variations which seem to be natural. However the analysis on the precipitation elasticity (E) of the river flow shows that the E values for all sub-Basins are greater than unity, which indicates that x% change in annual precipitation can cause > x% change in annual river flow. Further the Basin hydrological responses are analysed for a long term synthetically-induced drought the results of which show the significance of the base flow of the Mekong River Basin. Copyright © 2008 John Wiley & Sons, Ltd.

Suzana Alipaz - One of the best experts on this subject based on the ideXlab platform.

  • An Integrated Indicator Based on Basin Hydrology, Environment, Life, and Policy: The Watershed Sustainability Index
    Water Resources Management, 2006
    Co-Authors: Henrique Marinho Leite Chaves, Suzana Alipaz
    Abstract:

    Several issues impact the water sustainability of a river Basin. Among them are the social, economic, and environmental aspects. However, they are often treated separately, and not as an integrated, dynamic process. In order to integrate the hydrologic, environmental, life and policy issues, as well as the existing pressures and policy responses in one quantitative, dynamic, and aggregated indicator, a watershed sustainability index (WSI), which uses a pressure–state–response function, was developed and is proposed in this paper. Applied to a 2,200 km2 Unesco–HELP demonstration Basin in Brazil (SF Verdadeiro), the value obtained for WSI was 0.65, which represents an intermediate level of Basin sustainability.

Henrique Marinho Leite Chaves - One of the best experts on this subject based on the ideXlab platform.

  • An Integrated Indicator Based on Basin Hydrology, Environment, Life, and Policy: The Watershed Sustainability Index
    Water Resources Management, 2006
    Co-Authors: Henrique Marinho Leite Chaves, Suzana Alipaz
    Abstract:

    Several issues impact the water sustainability of a river Basin. Among them are the social, economic, and environmental aspects. However, they are often treated separately, and not as an integrated, dynamic process. In order to integrate the hydrologic, environmental, life and policy issues, as well as the existing pressures and policy responses in one quantitative, dynamic, and aggregated indicator, a watershed sustainability index (WSI), which uses a pressure–state–response function, was developed and is proposed in this paper. Applied to a 2,200 km2 Unesco–HELP demonstration Basin in Brazil (SF Verdadeiro), the value obtained for WSI was 0.65, which represents an intermediate level of Basin sustainability.

José-miguel Sanchez-pérez - One of the best experts on this subject based on the ideXlab platform.

  • Assessment of Hydrology and Sediment Yield in the Mekong River Basin Using SWAT Model
    Water, 2020
    Co-Authors: Ty Sok, Chantha Oeurng, Ilan Ich, Sabine Sauvage, José-miguel Sanchez-pérez
    Abstract:

    The Mekong River Basin (MRB) in Southeast Asia is among the world’s ten largest rivers, both in terms of its discharge and sediment load. The spatial and temporal resolution to accurately determine the sediment load/yield from tributaries and sub-Basin that enters the Mekong mainstream still lacks from the large-scale model. In this study, the SWAT model was applied to the MRB to assess long-term Basin Hydrology and to quantify the sediment load and spatial sediment yield in the MRB. The model was calibrated and validated (1985–2016) at a monthly time step. The overall proportions of streamflow in the Mekong River were 34% from surface runoff, 21% from lateral flow, 45% from groundwater contribution. The average annual sediments yield presented 1295 t/km2/year in the upper part of the Basin, 218 t/km2/year in the middle, 78 t/km2/year in the intensive agricultural area and 138 t/km2/year in the highland area in the lower part. The annual average sediment yield for the Mekong River was 310 t/km2/year from upper 80% of the total MRB before entering the delta. The derived sediment yield and a spatial soil erosion map can explicitly illustrate the identification and prioritization of the critical soil erosion-prone areas of the MR sub-Basins.