Advanced Materials Research Vols. 518-523

Abstract: The South–to–North Water Diversion project provides water mainly for Henan and Hebei province , Beijing and Tianjin city . So the ecological environment protection in the water source areas is very important. But the ecological environment of water source areas of the middle route project is damaged becsuse a large amount of fertilizer and pesticide are used in the field, the pollution is heavy, and some lakes are turned into fields at some area. The systematic ecological circulation circles have not been established. This paper puts forward the countermeasures and methods of establishing the ecological circulation circle in the water rource areas of the middle route project after it illustrates the importance of establishing the ecological circulation circle in the water source areas , and analyzes the problems of the ecological circulation circle in the water source areas.

Abstract: Environmental flow requirements (EFRs for short), which considered the requirements for protection of migratory fishes habitat in spawning and larval period, were analyzed in this paper for the Zhangweixin River Estuary (ZRE for short), China. Based on the different levels of salinity objectives and the relationship between salinity and the freshwater inflows, the EFRs for the ZRE were determined. Annual EFRs should be 2.1 × 108 and 9.9 × 108 m3 for the minimum and appropriate levels objectives in the ZRE, respectively. The minimum and appropriate EFRs can be satisfied by 38% and 11% of year’s annual freshwater inflows in the ZRE during 1956-2010, respectively. Moreover, with the freshwater inflows decreasing, the monthly EFRs for the ZRE cannot be fulfilled in longer period of the year. The seasonal discrepancy between the water quantity requirement to meet ecological goals and the practical freshwater inflows was outstanding during longer periods of the 2000s. The periods from March to September should be considered as the critical seasons to maintain the minimum environmental flows in the ZRE.

Abstract: The water resources is the necessary of human life and production, and also the main biological survival factors. In this paper, the Minqin basin water resources utilization, in Shiyang river basin.Minqin basin is one of the most serious areas, in China, the development and utilization of water resources angelica knot, the contradiction of the water and the ecological environment problems. Development and utilization of regional water more than its carrying capacity serious.Support the development of oasis and improve the ecological environment problems in Minqin basin, system analysis for the reasonable exploitation and utilization of groundwater need guarantee of rational use of water resources, and sustainable economic development and ecological environment of the benign circulation.

Abstract: Due to the shortage of fresh water in north-west China, the exploitations of saline water became very important for mitigating agricultural water shortage. Our study carried out plot experiments under different salinity water irrigation in the Shiyang River Basin, comprehensively considering the effect of water and salt factors on the growth of spring-corn, imported salinity stress factor and built water-salt production function basing on water production functions Blank model and Jensen model which were general used in the world. Through the Water-salt production function, calculating the salt sensitive index in different growth stage of spring-corn and the result shows that the salt sensitive degree sequence is seeding stage > jointing stage> tasseling-grouting stage> maturity stage.

Abstract: Along with the construction and implementation about a series of the national management planning of major rivers and lakes, more and more researchers pay attention to the environment audit about rivers and lakes comprehensive management. But in domestic studies on this issue is less, and creating a theory system about this issue has important practical significance. Therefore, through studying the situation and problems of the environment audit about rivers and lakes comprehensive management in Chinese, this paper try to constructing the environment audit mode about rivers and lakes comprehensive management, and putting forward the improvement Suggestions innovative, in order to provide some guidance on the audit work in theory and practice.

Abstract: This paper is based on "the method of ecological footprint of water resource" and through establishing "ecological footprint of water resource" model to analyze the water resources utilization of ChangZhuTan region, Xiangjiang River. Time-series is applied to researching the water resources utilization of ChangZhuTan region , Xiangjiang River from 2003 to 2009. Meanwhile, the indicators like ecological footprint of water resource and so on in the following 6 years are predicted. Ecological footprint of water resource per ten thousand yuan GDP is introduced to analyze the water utilization efficiency of ChangZhuTan Region, Xiangjiang River quantitively. The result shows that, from 2003 to 2009, the water resources of ChangZhuTan Region, Xiangjiang River is in the state of ecological Surplus, but the ecological surplus value decreases year by year, which means that the sustainable utilization of Xiangjiang River is getting worse. The prediction also shows that the ecological footprint of water resource per ten thousand yuan GDP will increase year by year in the next 6 years, which means that the water utilization will be less efficient.

Abstract: Along with the human activities and the economy development, the amount of waters resource has been decreased, the function of waters is weakened or losing, a series of the ecological environment problems has been gradually emerged. In order to better protect and manage waters resource, the legal system, institutional system, technology systems of the waters resource protection and management must be built as soon as possible, so that the work level of the waters resource protection and management will be advanced by the "three systems", the good condition of the local waters resource is the important guarantee for the social and economic sustainable development.

Abstract: With the increase in computational capability, numerical reservoir simulation has become an essential tool for reservoir engineering. To minimize the objective function involved in the history matching procedure, we need to apply the optimization algorithms. This paper is based on the optimization algorithms used in automatic history matching.

Abstract: Based on the general description of agricultural environment standards and view of economic sustainable development, the paper puts forwards that system can ensure economic sustainable development , and illustrates the system features of agricultural environment standards, therefore, holds that agricultural environment standards is system safeguard to achieve economic sustainable development. Finally, it raises some proposals to perfect China’s agricultural environment standards in order to make the economy keep sustainable development.

Abstract: Electricity demand response is the lever of economy and contradictions between the supply and demand, is effective short-term instruments that speedy resolve contradictions between the supply and demand [1]. Put forward the elements and implementation principle of demand response programs, divide the type of demand response programs, investigate the time span relationship between demand response market and demand response programs, analyze demand response programs in the practice of domestic and foreign, discuss the application strategy of demand response in large public buildings systems and energy management platform, and for the construction of China's demand response programs raise suggestions and ideas.