Firstly, according to water resource management interactive model based on ET, calculation methods of present ET, target ET and subtractive ET and realization approach of ET control in mountain counties have been put forward. Secondly, Linxian has been taken as an example to calculate present ET by RS monitoring method, target ET by top-down approach, and do township apportionment by SWAT model. Target ET in the year of 2020 and 2030 has been forecasted and subtractive ET has been calculated. Thirdly, aimed at ET reduction value, water saving potential of Linxian has been analyzed, approaches and suggestions for water resources efficient utilization has been proposed, references and experiences of ET control application in the water resources management for mountain counties has been provided.
Abstract-Due to natural conditions, work environment, maintenance management and other factors, in the course of the use, the aqueduct hydraulic structures may appear material aging, structural damage, performance and other situations, and bring hidden dangers to the safe operation. Aimed at the insufficient of the research status and the existing problems, according to structure characteristics of the aqueduct, combined with theoretical research and development trend, the paper proposed a method of fuzzy comprehensive evaluation analytic hierarchy to carry out the aqueduct hydraulic structures safety assessment. The method divided the aqueduct hydraulic buildings into three level indicators and four layers. Analytic hierarchy process is used in the weights determine of many influence factors, fuzzy comprehensive evaluation method is used in the multistage evaluation of the many influence factors, and finally with an example to show how the method was used in practical application.
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