Research On The Evaluation Of Comprehensive Treatment Base On RS And GIS On The Seasonal River In Inner Mongolian Reach Of The Yellow River

At present, the comprehensive treatment in units of a river region has become the main form of soil erosion control in all countries around the world. Now it is a hot topic. And it can offer important basis to reveal the effect of human behavior (comprehensive treatment) on the process and mechanism of ecosystem recovery. Also it can provide important reference for evaluating the ecological conservation and rational development and utilization of resources.The study area based on the area of ten Kong Dui, comprehensive control project is evaluated. The evaluation study Including two project, one is bed-building silt to soil quality evaluation; the other is artificial afforestation as the main measures of the ecological environment effect. Soil quality evaluation is a male WuSu bed-building silt ground engineering as the research object, using the analytic hierarchy process and fuzzy mathematics method and the improved mutation progression method of bed-building silt to evaluate soil quality, the implementation of the project is studied in the case of soil improvement, and combined with the geographic information system hierarchy of the improved soil quality. Ecological environment effect evaluation is based on the concept of DPSIR framework model, respectively, set up a small watershed scales (77.7-258.9 km2) and mesoscale (2589 km2～25890 km2) under the ecological environment effect index evaluation system, build the different models and studied with the aid of remote sensing and geographic information system of afforestation project (three north shelter forest, returning farmland to forest, etc.) of the dynamic process of ecological environmental impact assessment. The main achievements and conclusions are as follows:1.The Bed-building silt ground engineering on the sand to ten Kong Dui areas improved soil quality evaluation research. The empirical study is the male WuSu bed-building silt project.The new upstream section to sedimentation of soil quality index is 0.5403, the new sediment middle segment of 0.3834, new silting downstream segment of 0.3878, the sand ground is 0.2586 Using AHP and fuzzy mathematics method of the evaluation. The new upstream section to sedimentation of soil quality index is 0.4831. the new sediment middle segment of 0.2980. new silting downstream segment of 0.2972. the sand ground is 0.2925 with the improved mutation progression method of the evaluation result. Improved mutation progression method compared with the traditional method, has the following advantages:only need to determine the importance of every index, reduce the problem of human subjectivity; A small amount of calculation and convenient for application; Application model is relatively simple.For soil after many years of bed-building to the ground through field soil collection and analysis of soil samples, laboratory test, and established the male WuSu using geographic information system spatial database of soil quality. Among them, the grade Ⅲ area is 68.2%; Ⅱ area is 30.7%, grade Ⅰ area ratio is 1.1%.2. The concept is build based on the DPSIR framework model of watershed scales of ecological environment effect evaluation index system, and the ear words ditch typical small watershed as the object of empirical study watershed scale, respectively, the DPSIR mDSS, DPSIR GRA and DPSIR-TOPSIS three evaluation model were builted to research the afforestation project (artificial afforestation grass) dynamic process of ecological environmental impact assessment.The evaluation of DPSIR model-mDSS result were that driving force points, pressure breakdown, influence disciplines all showed a trend of fluctuations in development. State of weak linear increasing trend development, the response of basic remains the same, and driving force component, pressure points and impact breakdown value is greater than the state points and response breakdown; Theecological environment of changing with time in fluctuation. The trend of economy is linearly increasing and social breakdown basic remain unchanged from the perspective of ecological environment, economy and society system.The evaluation of DPSIR-GRA model result:were that driving force points, pressure breakdown, influence breakdown, all showed a trend of fluctuations in development, late increase obviously. The State of sustained is growing, itemized response associated with engineering measures of the implementation of the area, at the beginning and the end of the project is lower and the middle increasing year by year. Ecological environment component showed a trend of fluctuations in development, but the fluctuation is not obvious, the ecological environment of value is higher than social breakdown and economic breakdown, increasing trend item of economic value. The trend of social breakdown value is a weak downward.The evaluation of DPSIR-TOPSIS model were that ear word gully watershed comprehensive control of ecological environment effect evaluation of comprehensive value showed a trend of fluctuations in development, to have more project at the end of growth, at the same time, due to the land type, rainfall characteristics, temperature changes and the impact of human activities, soil and water loss problem is still the main problem of ear characters gully watershed ecological environment.Three evaluation model were analyzed. the DPSIR-GRA model income effect value overall income effect is higher than the other two kinds of model, but the degree of differentiation is not obvious, so the DPSIR-GRAmodel is not a good characterization of small watershed comprehensive control of dynamic variation characteristics of ecological environment effect. DPSIR-TOPSIS model relative to the DPSIR-mDSS model can better characterize small watershed ecological environment fluctuation change this trend, so in this paper the established three model method, the DPSIR-TOPSIS model can better evaluation of small watershed comprehensive harness ecological environment effect dynamically.3.The study based on the concept of DPSIR framework model under the mesoscale ecological environment effect evaluation index system, and with dalad (The area accounts for 10 Kong Dui is76.2%) for mesoscale empirical research object, using remote sensing (RS) and geographic information system (GIS), combining with system theory, landscape ecology, mathematical statistics and so on as theoretical guidance, The afforestation project (three north shelterbelt, returning farmland to forest project) is studied, the dynamic process of ecological environmental impact assessment, and the ecological environment effect of the change of time and space distribution is drawing.The study area,1985,1990,1995,1990,2005,2010, six years of comprehensive effect index were 0.34,0.35,0.46,0.49,0.54,0.59,Description the comprehensive control measures which is given priority to vegetation restoration for the improvement of the ecological environment has certain. But the ecological environment effect that the value is below 0.6, which is very easy to influence the human factors and natural factors.