Multiple-purpose Reservoir Research Articles

Application of modified enhanced differential evolution algorithms for reservoir operation during floods: a case study

Abstract Operating a reservoir during flooding is a complex problem in which optimum decision-making is a difficult task. The present study demonstrates a solution for the operation of flooding problem in a multiple-purpose reservoir. A reservoir on River Narmada in central India is chosen as the case study. The multiple objective problems comprised maximization of hydropower releases, minimizing spills, and achieving stipulated target storage at the end of the operation period. The chosen optimization models are the Differential Evaluation Algorithm (DEA) and its variants: the Enhanced Differential Evolution Algorithm (EDEA) and the Modified Enhanced Differential Evaluation Algorithm (MEDEA). The EDEA model is modified in the present study to MEDEA. The results of all three models applied to the same case study are compared on convergence to an optimal solution. All three algorithms were tested on two of the popular benchmark functions that are Ackley and Sphere. The results of both applications demonstrated that MEDEA proved to be the best in terms of converging to the optimal solution, exhibiting better stability, and quality of final results. The outcomes of this study also provided an effective way to optimize large scale multi-purpose and multi-reservoir flood control operation problems.

Optimal Reservoir Operation of Multiple-purpose Reservoirs in the Tropic Monsoon Area

Optimal Reservoir Operation of Multiple-purpose Reservoirs in the Tropic Monsoon Area

Assessment of Flood Control Capabilities for Alternative Reservoir Storage Allocations

Multiple-purpose reservoir system operations are based on the conflicting objections of maximizing storage contents to assure high water supply reliability and maximizing empty storage space to mitigate flood risk. Reallocation of storage capacity between conservation and flood control purposes provides a strategy for optimizing limited available storage capacity in response to growing demands and changing objectives. A modeling and analysis methodology is presented in the article for assessing alternative reservoir storage allocations. Flood control capabilities are evaluated in terms of the probabilities of overtopping the storage capacities of the reservoirs in the system. Water supply capabilities are quantified in terms of reliability metrics. Flood control analysis capabilities are implemented in a modeling system originally created for detailed assessments of water supply capabilities. The methodology is applied to a system of eight multiple-purpose reservoirs in the Dallas and Fort Worth metropolitan area in the Trinity River Basin of Texas in the United States. The generalized modeling system and analysis methods are applicable to reservoir systems located anywhere including systems that may be very complex.

Assessment of relative impact of reservoir location

Reallocation of reservoir storage capacity for different water use purposes is regarded as one of the representative strategies for supplying water for human and environmental needs under the difficult situation of new reservoir construction. However, there are impacts of reservoir storage reallocation on river/reservoir systems because each reservoir in a multiple reservoir system is operated by priority order, not by natural order. Accordingly, this study focuses on evaluating the relative impact of reservoir location on a system of 14 multiple-purpose reservoirs and hydrology characteristics modification. The natural and priority orders are considered for three reallocation strategies. The comparison results of reliability, flood frequency, and economic flood damage indicate that individual reservoir storage reallocation has an impact on nearby reservoirs and river systems at downstream points, which are located directly below the reservoir. The multiple reservoir storage reallocation plans are reliable strategies for lessening the impacts on river/reservoir operating systems.

Historical, current, and future economic benefits and costs relating to Lake Waco, Texas

Lake Waco is an important economic asset for Central Texas. Since 1964, Lake Waco has been utilized as a multiple-purpose reservoir, providing flood protection (more than $258 million in damages prevented), a public drinking water source for 200,000 Central Texans (the City of Waco Utilities Department budget is $40 million per year), and recreational area by up to 2 million people per year. A rise in the conservation pool level increased the drinking water yield by 26 million cubic meters per year but temporarily interfered with recreation. Despite a drop in recreational usage for several years (2001–2005) and significant increases in the quality and quantity of recreational facilities during the pool rise project, the economic impact to local communities remained between $8 and $27 million dollars per year, depending on the method applied. Results from application of the Money Generation Model Version 2 indicate that approximately 750 local jobs are supported by recreational spending. There is a substantial economic return on investments in the enhancement and protection of Lake Waco.

LONG‐TERM CHANGES IN REGIONAL HYDROLOGIC REGIME FOLLOWING IMPOUNDMENT IN A HUMID‐CLIMATE WATERSHED1

ABSTRACT: We analyzed the type of hydrologic adjustments resulting from flow regulation across a range of dam types, distributed throughout the Connecticut River watershed, using two approaches: (1) the Index of Hydrologic Alteration (IHA) and (2) log‐Pearson Type III flood frequency analysis. We applied these analyses to seven rivers that have extensive pre‐and post‐disturbance flow records and to six rivers that have only long post‐regulation flow records. Lastly, we analyzed six unregulated streams to establish the regional natural flow regime and to test whether it has changed significantly over time in the context of an increase in forest cover from less than 20 percent historically to greater than 80 percent at present. We found significant hydrologic adjustments associated with both impoundments and land use change. On average, maximum peak flows decrease by 32 percent in impounded rivers, but the effect decreases with increasing flow duration. One‐day minimum low flows increase following regulation, except for the hydro‐electric facility on the mainstem. Hydrograph reversals occur more commonly now on the mainstem, but the tributary flood control structures experience diminished reversals. Major shifts in flood frequency occur with the largest effect occurring downstream of tributary flood control impoundments and less so downstream of the mainstem's hydroelectric facility. These overall results indicate that the hydrologic impacts of dams in humid environments can be as significant as those for large, multiple‐purpose reservoirs in more arid environments.

Information Requirements for Improving Hydropower

A method of analysis is described with the objective of determining how (and whether) aerospace derived information system technology can effectively increase hydropower production. The increase in annual hydropower benefits is derived from more accurate reservoir inflow forecasting based upon the use of new or improved sensors and satellite data relay systems. Sensitivity analyses are presented for watershed parameters imbedded in conceptual watershed models. Results are related to hydropower production and sensor requirements via a reservoir optimization model to establish information system requirements. A numerical example is presented using a typical multiple purpose reservoir system located in northern California.

Computer Use for River Regulation

The complexity that occurs in regulating multiple-purpose reservoir systems has necessitated the use of computer programs for scheduling reservoir regulation. The need for real-time use of scheduling computer programs coupled with the complexity of multiple-purpose reservoir regulation has made automated regulation schemes and interactive computer processing highly desirable. The scheduling engineer must be able to examine easily results of a trial computer simulation and modify operating constraints and forecasted information as necessary to retry the simulation. The package of stand-alone computer programs with interfacing capability is considered. These programs are used in real-time reservoir regulation and streamflow forecasting analyses in the North Pacific Division office of the Corps of Engineers. No optimization procedures are used but experience indicates that the techniques used to simulate reservoir regulation coupled with the interactive computer processing features effectively provide good multiple-purpose system operation.

Impact of Multiple-Purpose Reservoir System on Regional Environment

In 1933 the Tennessee Valley needed the resource tools with which to improve itself economically. In addition to the tools to rehabilitate agriculture, the TVA provided the developed river. Flood control has made the level land on the shoreline safe from floods and, therefore, safe for industrial use. The waterway provides low-cost barge transportation. The impoundment of water provides abundant supplies for cities and industries. It provides a great source for water-based recreation, vital to the welfare of all in today’s world. And, of course, TVA dams and steam plants provide large amounts of electric power at low cost. Capitalizing on opportunities in the Tennessee Valley in the future will require bold new programs to upgrade the quality of life in the region, particularly in the rural areas. It will require imaginative planning to guide the development of rapidly growing small towns and comprehensive approaches to revitalize existing cities and even create new ones. In some instances, it will require carefully coordinated development.

Closure to “Optimum Design of a Multiple-Purpose Reservoirs”

Closure to “Optimum Design of a Multiple-Purpose Reservoirs”

Discussion of “Optimum Design of a Multiple-Purpose Reservoir”

Discussion of “Optimum Design of a Multiple-Purpose Reservoir”

Discussion of “Optimum Design of a Multiple-Purpose Reservoir”

Discussion of “Optimum Design of a Multiple-Purpose Reservoir”

Optimum Design of a Multiple-Purpose Reservoirs

A method for the optimum design of a reservoir to provide regulated water for several purposes is described that separately allocates the water to the different purposes and then allows for the use of some of the water for more than one purpose. Dynamic programming is used to effect the optimum allocation in terms of a number of different values of regulated flow. Flood control storage is considered separately in terms of marginal cost and marginal benefit. The limitations of the approach arise from the limitations of the concept of regulated flow. Extensions to overcome the limitations are indicated.

Operation of Missouri River Main-Stem Reservoirs

The six main-stem multiple-purpose reservoirs built under the “Pick-Sloan” program adopted in 1944 are described. The main operational features of these reservoirs concern flood control, irrigation, water supply and sanitation, power, navigation, recreation, and fish and wildlife. The writer outlines the development of the highly complex operating plans and criteria by the coordinating committee, with representation from nine states and seven federal agencies working with the Reservoir Control Center, in Omaha, Nebr.

Willamette valley radio system for the united states corps of engineers

Winter floods in the willamette river Basin in Western Oregon wreak havoc and destruction from frequent flooding of a highly-populated and developed valley, 150 miles in length. Congress instructed the United States Corps of Engineers (USCE) to study the problem in the Willamette Valley and to make specific recommendations. As a result the Corps has recommended a system of 16 multiple-purpose reservoirs. These reservoirs were to be located on the major tributaries in the basin and would control a total of 3,200 square miles of the 11,200 square miles in the basin. At the present time five of the recommended reservoirs are in operation, two are under construction, and planning is under way on two more.

AN EMPIRICAL INDEX OF SEASONAL VARIATION OF INTENSE PRECIPITATION OVER LARGE AREAS

Abstract Adequate design and sound operational procedures for levees, spillways, and multiple-purpose reservoirs require a knowledge of seasonal variation of precipitation of high intensity as well as soil infiltration capacities, antecedent rainfall, and snow melt. The problem of seasonal variation is approached by indirect methods since there is an inadequacy of data on large storms. A technique of areal smoothing is introduced and used to overcome lack of suitable areal distribution of large storms studied in detail. A set of bi-weekly charts is developed giving approximately equal likelihood of occurrence of high rates of rainfall over areas of 20,000 square miles in 72 hours.

Snow Hydrology for Multiple-Purpose Reservoirs

Snow Hydrology for Multiple-Purpose Reservoirs

Multiple-Purpose Reservoirs: A Symposium: State and Federal Government Participation

This paper presents some rather important aspects of the relations between the federal government and the respective state governments as they pertain to the question of multiple -purpose water res...

Multiple-Purpose Reservoirs: A Symposium: Planning for the Recreational Use of Reservoirs

Since about 1946 there has been a great outpouring of literature in regard to the various proposals advanced for the control of water resources in the United States, particularly west of the Missis...

Multiple-Purpose Reservoirs: A Symposium: Their Relation to Fish and Wildlife

Multiple-Purpose Reservoirs: A Symposium: Their Relation to Fish and Wildlife