Water Control Plan Research Articles

Upstream water management and its role in estuary health, evaluation of freshwater management and subtropical estuary function

In highly modified and managed systems the balance of freshwater inputs discharged to estuarine systems are important to maintain salinity balances and thus estuarine function. However, the availability of freshwater is highly dependent on upstream water management to provide flood protection whilst meeting freshwater demand for people and the environment. In South Florida, water is managed by a water control plan with Lake Okeechobee at the center. Currently, water levels within the lake are managed based on the Lake Okeechobee Regulation Schedule of 2008. The new regulation schedule, Lake Okeechobee System Operating Manual (LOSOM), updates water management rules while attempting to balance the needs of downstream systems; salinity and water quality in the Caloosahatchee and Saint Lucie (northern) estuaries; and more water for the southern Everglades. This study evaluates LOSOM relative to ecologically significant performance measures for the northern estuaries. Overall, the proposed regulation schedule is expected to provide a more sustainable flow regime to the estuaries by reducing stressful and damaging discharge events. Moreover, new management rules combined with new infrastructure are expected to reduce low discharge events to the Caloosahatchee estuary and reduce stress on key indicator species such as Vallisneria americana during the wet season. This regulation schedule provides improved conditions for the estuaries at the expense of higher Lake Okeechobee stages. Future restoration and water management will maintain the benefits afforded to the estuaries while at the same time reducing the impacts to Lake Okeechobee resulting in a more sustainable and resilient system.

Executive phase of flood water control plan (case study: Kangavar city, Kermanshah province in middle of the western part of Iran)

Executive phase of flood water control plan (case study: Kangavar city, Kermanshah province in middle of the western part of Iran)

Executive Phase of Flood Water Control Plan of Kangavar City, Kermanshah, Iran

Executive Phase of Flood Water Control Plan of Kangavar City, Kermanshah, Iran

Research on Dynamic Monitoring Technology for Dengsi Gas Reservoir in Gaoshiti Moxi Block

The fourth group gas reservoir in the Moxi platform edge zone of Anyue Gas Field is a super large carbonate gas reservoir with edge and bottom water in China. There is no mature development experience in this type of gas reservoir in China, and there is a lack of a systematic dynamic monitoring system. This article focuses on the challenges and key technical issues faced by gas reservoir dynamic monitoring work. Through active exploration, continuous improvement, and innovation of dynamic monitoring technology and analysis methods, a dynamic monitoring system suitable for the four groups of gas reservoirs with lights at the edge of the Moxi platform has been constructed. Five key dynamic monitoring technologies, including pressure and temperature dynamic monitoring technology, production capacity monitoring and evaluation technology, fluid property monitoring technology, water invasion monitoring and identification technology, and well connectivity monitoring and evaluation technology, have been developed for the four gas reservoirs in the Moxi platform edge zone. Scientific and reasonable development measures have been formulated to support the preparation of the overall water control plan for the gas reservoir, It has played a role in ensuring the scientific and efficient development of large-scale edge and bottom water carbonate gas reservoirs.

Key technologies and progress of enhanced gas recovery in water-bearing carbonate gas reservoirs

Global oil and gas consumption continues to rise and new strategies are required to meet the growing demand. Carbonate gas reservoirs are an important natural gas resource that are often accompanied by water intrusion during the development process. The efficient development of such reservoirs has therefore been extensively studied and met with difficulty. This paper summarizes the basic geological and water invasion characteristics of water-bearing carbonate gas reservoirs and correlates the two. A method for identifying water invasion types by production dynamics is introduced. The variation curve of the production water to gas ratio is shown to correspond with the reservoir geological characteristics. Typical development methods and the advantages/disadvantages of different water control techniques are summarized. The findings are used to propose a full-cycle water control plan for water-bearing carbonate gas reservoirs, and the development strategies of “early preparation, early discovery, and early treatment” and “re-analyze, re-assess, and re-adjust” are implemented to organically combine water control, drainage, and water blocking methods. The results provide a reference for formulating efficient and scientific development plans of water-bearing carbonate gas reservoirs.

Mechanism of Urban Black Odorous Water Based on Continuous Monitoring: A Case Study of the Erkeng Stream in Nanning

Black odorous water seriously endangers urban ecological functions. The "Water Pollution Prevention Action Plan" promulgated by the State Council has attached great importance to this issue and set a timetable for achieving the goal of pollution remediation of the urban black odorous water problem. However, in the process of managing the city's black odorous water, we found that the apparent governance effect is not sustainable. Many of the urban waters that have been treated to become clear have returned to a black odorous state. This problem has constrained the completion of the black odorous water control plan, and urgently needs to be resolved. To explain the reason for this phenomenon, we chose the Erkeng Stream in Nanning as the research object, which is a water body that returns to a black odorous state after treatment. We used a multi-parameter water quality tester and chemical analysis method to carry out daily continuous monitoring for 24 h and monthly dynamic monitoring of the water body. The results showed that the rainfall process was significantly correlated with the ammonia nitrogen concentration in the water (P<0.01), and the temperature was positively correlated with the trend of ammonia nitrogen concentration in the water (r=0.23, P<0.05), which in turn was negatively correlated with the change trend of water transparency (r=-0.33, P<0.01). The above results show that the return of the black odorous state may be related to the microbial degradation of endogenous pollutants and the input of external pollutants. The reason may be:① The microorganisms are driven by light and temperature to promote the development of water in the direction of the black odorous state; ② Contaminants carried by rainfall promote the formation of black odor in water bodies. In short, in the context that internal pollution cannot be completely eradicated and external pollutants are difficult to control effectively, to prevent the treated urban water body from returning to a black odorous state, attention should be paid to endogenous pollutants such as river sediment and its control technology. Moreover, ecological control measures should be comprehensively adopted to reduce the input of external source indicators.

Frameworks for amending reservoir water management

Managing water storage and withdrawals in many reservoirs requires establishing seasonal targets for water levels (i.e., rule curves) that are influenced by regional precipitation and diverse water demands. Rule curves are established as an attempt to balance various water needs such as flood control, irrigation, and environmental benefits such as fish and wildlife management. The processes and challenges associated with amending rule curves to balance multiuse needs are complicated and mostly unfamiliar to non-US Army Corps of Engineers (USACE) natural resource managers and to the public. To inform natural resource managers and the public we describe the policies and process involved in amending rule curves in USACE reservoirs, including 3 frameworks: a general investigation, a continuing authority program, and the water control plan. Our review suggests that water management in reservoirs can be amended, but generally a multitude of constraints and competing demands must be addressed before such a change can be realized.

Engineering Practice of Water Control by Nearly Orebody Curtain Grouting in Laixin Iron Mine

The paper introduces the practical application of underground nearby orebody curtain grouting in Laixin iron mine. Based on the analysis of hydrogeology condition in the mine and the technical requirements of water control plans, the final water control plan introduced in the paper is chosen. Roadway horizontal drilling water-prospect grouting and transverse and slant drilling encrypting grouting are described, and quantities of the two projects are given. Finally, significant economic and environmental benefits caused by underground nearly orebody curtain grouting in Laixin iron mine are analyzed.

Application of Combined Matlab and VB Model in Water Pollution Control Planning

In order to visualize the water control planning, optimization of Matlab is embeded into VB programe. Friendly man-machine interface can easily realize the integration of data analysis and water pollution control optimization which can form the visualization software related to water pollution control programs. Examples are shown that combination of the two programmes can greatly enhance the grade and accuracy of planning to improve the work efficiency. The potential applications of the combination of VB and Matlab are discussed in final discussion.

Multiple-attribute evaluation of ecosystem management for the Missouri River system

Multiple attribute evaluation is used to score and rank five management alternatives for the Missouri River system developed by the U.S. Army Corps of Engineers. Alternatives are characterized by 10 attributes, namely flood control, hydropower, recreation, Missouri River navigation, water supply, fish and wildlife, interior drainage, groundwater, historic properties and Mississippi River navigation. Since preferences for the attributes are unknown, alternatives are compared using four hypothetical attribute-weighting schemes. Utility scores for the alternatives obtained using a linear additive utility function indicate that the modified conservation plan (MCP), which incorporates adaptive management, increased drought conservation measures, changes in Fort Peck dam releases and unbalanced levels in the upper three reservoirs, is preferred to the current water control plan (CWCP) with the neutral, pro-recreation/fish and wildlife, and pro-fish and wildlife weights. MCP ranked above the four Gavins Point (GP) alternatives except with the pro-fish and wildlife weights. CWCP is more preferred than the four GP options with the neutral and pro-agriculture weights and less preferred with the pro-recreation/fish and wildlife and pro-fish and wildlife weights. The GP option with the lowest reduction in summer flow and smallest spring rise (GPA) ranks above the GP option with the highest spring rise and greatest reduction in summer flow (GPB), a spring rise only (GPC) and a lower summer flow only (GPD).

Dynamic fractured flow simulation model : Oswili-Eger, A S C Min EngngV41, N2, Feb 1989, P110–114

An efficient state-of-the-art dynamic model to simulate and predict the rate of water production in longwall coal mining operations was developed as a tool for mine planning purposes. The model can also provide an estimate of any potential resultant hydrogeological impacts of an operation via an array of element-specific single-valued parameters referred to as the field rating indices. The computational procedure was designed to fully exploit the benefits of hydrogeotechnology and use a combination of conceptual, physical, empirical, and numerical approaches to define, characterize, analyze, and evaluate flow controlling properties of fractured rock systems. The model presented here provides a dynamic prediction method for highly fractured flow; a practical tool in mine and water control planning; and a cost-effective means of assessing, based on the best available technology, the impacts of mining on the water resources within a mining environment to satisfy local and federal regulatory requirements. Unique features include consideration of laminar and non-darcian flow domains in double-porosity-pressure hydrogeological media.

FOREST HYDROLOGIC RESEARCH CONDUCTED BY THE TENNESSEE VALLEY AUTHORITY

ABSTRACTHydrologic research by the Tennessee Valley Authority is coordinated by the Division of Water Control Planning, with the assistance of various specialized divisions. Since 1934 the Division of Forestry Development has participated in six hydrologic studies involving watersheds that were completely or partially forested. A brief description of these projects, along with some major results and implications are given.