The Evaluation Method And Demonstration Research On The Sustainable Land Use In The Three Gorges Reservoir Area

The Three Gorges Reservoir Area is a mountainous area where has fragile ecologic environment, behindhand development of economy and society, incisive contradiction between human and land, very limited land resources especially those fit for cultivation. With the water line rise to 175m, there will be more cultivated land being flooded in the Reservoir Area, and this will undoubtedly aggravate the contradiction between human and land. As a key area in the western ecologic environment construction and an important component in the upper reaches of the Yangtze River economic district, the Three Gorges Reservoir Area has very important strategic place. Therefore, how to solve the problem of land use in this area, inquire into the model of sustainable land use, realize the goal of regional economic and social sustainable development following the guide of scientific developing theory, these have became urgent questions that need to be settled immediately.This paper took the existing actuality in the Three Gorges Reservoir Area as its research background, that is the deteriorating ecologic environment and the imbalanced man-land relationship, applied the fundamental theory of land use like sustainable development theory, geographical location theory, man-land relationship theory, systematic theory, etc, described the actuality of land use in the Three Gorges Reservoir Area by using mathematic rational analysis method. On the basis of analyzing the land use problems in that area, this paper advanced the direction of land use in the Three Gorges Reservoir Area, namely changing the producing way of agriculture and developing forestry suit to local conditions, then combined the particularity of man-land relationship and land use in the Three Gorges Reservoir Area, elaborated the characteristics of sustainable land use evaluation, established the PSR-based model to evaluate the sustainable land use in the Reservoir Area. During the each part of this evaluating method in the process of evaluation, like the selection of the suitable indexes, the confirmation of weight and limit of those indexes, the actual situation of the Three Gorges Reservoir Area has been considered comprehensively. Then the author made a demonstration research on the Wushan County using this evaluating theory and advanced the Countermeasures on the sustainable land use in the Three Gorges Reservoir Area. Through research, this paper made the following main conclusions:i .It is maneuverable that using the conclusions made by demonstration research to guide the land use in the Three Gorges Reservoir Area, because the measures to optimize the regional land use will be carried out in a particular administrative unit of this region in the final analysis. Unless the status of land use in these administrative units has been improved, the whole region will not make a sustainable use of land resources.ii. Through the evaluation of sustainable land use on Wushan County, it turned out that the sustainable status of land use in Wushan County was weak, while through a dynamic evaluation of sustainable land use from 1997-2004, it showed that the sustainable status of land use was improved progressively, the land use was heading for a sustainable status.iii. The obstacle factors that hinder the sustainable land use in Wushan County were as follows: the indifferent consciousness on land conservation, over cultivation of land, indistinctive industry predominance, etc. it was found out by the author that this circumstance was commonly existed in the Three Gorges Reservoir Area.iv. After analyzing the obstacle factors existed in the sustainable land use in the Wushan County and even the Three Gorges Reservoir Area, this paper put forward the specific Countermeasures to relieve the man-land relationship adapt to that area. These Countermeasures were all concluded based on the specific research and full of practical sense.