| Water is the source of life,the key to production,and the basis of ecology.The problem of water ecological environment is the hotspot and difficulty of current research.Affected by global climate change and human activity strengthened,as well as the influence of the water environment and ecological environment events occur,water ecological environment problems are still serious,the water ecological environment governance,and improve the working a long way to go.This paper takes the Guanzhong plain in central Shaanxi province as the study area.In canal irrigation district,using rmultidisciplinary cross theory and method of conducting computed,in canal irrigation water ecological environment evolution and health evaluation research.Based on the analysis of the problems and causes of the water ecological environment in the irrigation area,the numerical analysis,dynamic simulation,visual simulation and thematic evaluation of the water ecological environment in the irrigation area are carried out by means of modern information technology,which is the water ecological environment management and sustainable development of the Jinghui canal irrigation district.Provide theoretical basis and technical support.The main results and conclusions of the paper are as follows:(1)Analyze the water ecological environment problem and its characteristics in the Jinghui canal irrigation area.Based on the systematic introduction of the geographical location,hydrology and meteorology,hydrogeology and socie-economic of the Jinghui canal,this paper analyzes the problem of water ecology and environment in the irrigation area of the Jinghui canal,and investigates an attribution of the problems.The problem of water ecological environment in the Jinghui canal irrigation district was analyzed and attributed.The characteristics of water ecological environment impact factors in the irrigation area of the Jinghui canal were analyzed from the aspects of precipitation,runoff and water quality.The results show that the problems of water ecology and environment in irrigated areas are mainly reflected in water shortage and serious pollution,groundwater overexploitation,soil salinization results show that the problems of water ecology and environment in irrigated areas are mainly reflected in water shortage and serious pollution,groundwater overexploitation,soil salinization and biodiversity destruction.The main factors affecting the above-mentioned problems include natural disasters,increased human activities and history.(2)Establish a three-demision visualization platform of the water ecological environment in the Jinghui canal irrigation district.By using multi-source data integration and information fusion technology based on historical data,remote sensing,and other space data and dynamic monitoring data of multi-source information fusion,put forward irrigation area water environment data integration service.Digital earth and digital earth integrated service mode,service platform system design and development were computed.in canal irrigation water ecological environment evolution of three-dimensional visualization platform The results show that the three-demision visualization platform based on digital earth has huge amounts of multi-source information fusion,good visualization effect,scalability and easy operation.It can better to query the irrigation area water ecological environment of basic information and real-time data,to implement functions such as water ecological environment evolution analysis and water quality transport simulation of the channel.(3)Achieve the dynamic simulation of groundwater and water quality in the Jinghui canal irrigation area.According to the analysis of water ecological environment problems were computed.in canal irrigation district,the use of groundwater and water quality simulation software GMS for typical regional groundwater and water quality modeling,building,water quality simulation and analysis of groundwater numerical equation,the mathematical model of water and salt migration,simulate dynamic change process of groundwater,water quality based on the Agent model implements the river water quality and water and salt migration simulation.The results show that the GMS modeling tool can be used to carry out numerical analysis and numerical simulation of the groundwater in the irrigated area.By simulating the simulation area of the hydrogeological unit,the dynamic simulation of groundwater can be realized in the three-dimensional visualization environment.The Agent model was applied to water quality simulation,and the groundwater and river water quality were statistically analyzed,dynamically simulated and visualized according to different time and space steps,which provided decision support for the evolution of water ecological environment in the irrigated area.(4)Propose the evolution of water ecological environment and thematic mode of health evaluation in irrigated areas.The thematic health evaluation service platform for ecological environment based on the comprehensive integration platform in irrigated areas was established.The multi-source information fusion technology was used to screen the health factors of typical water ecological environment problems in the study area,and an evaluation index system and evaluation model were established.The dynamic theme service model was adopted to evaluate the evolution of water ecological environment in the Jinghui canal irrigation district.The thematic application of water ecological environment in the irrigated area is carried out based on thematic service platform through the modular development of themes,selection indexes,evaluation indexes and methods.The results show that the dynamic evaluation is carried out by using thematic service,which provides decision support services for decision makers while comprehensively analyzing the water ecology and environment problems in the irrigated areas,improves the water ecological environment management and improvement effect of the irrigated areas,and promotes the sustainable development of the irrigated area. |
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