As is much of the world, California increasingly is challenged by water scarcity. A recent multiyear drought depleted surface reservoir and groundwater storage in many places of the state. The Sustainable Groundwater Management Act (SGMA), passed in 2014, promises sustainable groundwater management in California and suggests managed aquifer recharge (MAR) as one of the key practices to eliminate groundwater overdraft by groundwater sustainability agencies. Questions remain, however, about the amount of water available for MAR. Conjunctive management provides the opportunity to modify reservoir operations and enhance recharge long before any drought occurs. However, the amount by which reoperation of surface reservoirs can increase the available water for MAR has not been thoroughly investigated. Folsom reservoir is operated to meet a variety of objectives, including flood control, water supply, hydropower, and environmental flow. The inclusion of water discharge for groundwater recharge adds another objective for the operation of the reservoir and complicates the decision-making. Various management strategies were developed and applied to evaluate performance of the system during a historical period, and a new objective was added to maximize the available water for recharge from Folsom reservoir. Although the reoperation strategy offers additional storage in the system and increases the expected value of recharge from 280 to 430 million cubic meter (mcm) per year, trade-offs between different objectives showed that new operating rules perform quite satisfactorily, with nonsignificant deficits and violations of …
Publications by Year: 2020
2020
Low lying coastal cities are under high risk of the compound flood with frequent storm surge occurrence and sea-level rise. This study attempted to develop a hybrid modeling framework to simulate various physical process of the compound flood. In this regard, first, the storm surge process is simulated using a wave-flow coupled model ie, Delft3D-FLOW and simulated wave nearshore (SWAN). The meteorological forcing for the hydrodynamic model has been done by integrating a parametric Holland cyclone model in this framework. The urban flood process in compound flood is also simulated using a rainfall-runoff model, the storm water management model (SWMM). The case study to evaluate the performance of the modeling framework is selected as the northern Bay of Bengal and extends to surge affected areas of Chittagong coast of Bangladesh. The modeling system is employed to simulate compound flood …