%0 Journal Article
%T Discussion on Optimal Allocation Methods of Water and Land Resources at the Watershed Scale<br>流域水土资源优化配置的几种方法比较
%A GENG Yan-hui
%A MIN Qing-wen
%A CHENG Sheng-kui
%A <br>耿艳辉
%A 闵庆文
%A 成升魁
%J 资源科学
%D 2007
%I 
%X Although there are lots of researches on optimal allocation of water or land resource at present, few have combined the two factors with each other both in macro- and micro-scale. The study in macro-scale would help to promote regional allocation efficiency and, in contrast, the study in microscopic scale would help to raise resources utilization efficiency. In general, the researches on macro-scale focus on adjusting crops structure, making master plan of irrigation for irrigated agriculture in arid and semi-arid areas. But the researches in micro-scale allocation all more emphasize to achieve high economic benefits. Now people pay more and more attention to the study on establishing models and adjusting parameters in order to improve degraded ecosystems and ecosystem services to meet the increasing needs to regional sustainable development. However, many researchers pay more attentions to single elements than the couple system with water and land resources, especially their interaction. The mathematical methods to realize optimal allocation have transformed from qualitative to quantitative, and lots of models have been used in the process, such as general linear programming, grey linear programming, dynamic programming, multi-objection decision-making and system dynamics model. These methods have different merits and application scales. It is no doubt that the dissection and comparison for the models are very important, but we should not ignore to improve their operational efficiency and to find the port to connect different methods. And, it is necessary to transform and combine the results referring to both of macro- and micro-scales. Currently, scholars pay lots of attentions on Decision Support System, which combine Remote Sensing, Geographic Information System and Global Position System (3"S") techniques with special models, so as to provide enough supports to water and land resources optimal allocation and management. Through analyzing these methods for optimal allocation, the in-depth studies were suggested as following: 1) to further perfect the theories and techniques of optimization allocation viewing from the systematical point combining with the nature of watershed; 2) to strengthen the integration between GIS and quantitative models; 3) to reinforce the study on some related problems liking the quantification of regional ecological benefits, the determination of ratio of ecological and economic benefits, the theories and methods of ecological water requirement, the hydrological effects of forest vegetation, the key techniques of agricultural water-saving and water resource management; and 4) to develop the decision support systems for water and land resources optimal allocation in watershed scale.
%K Watershed
%K Water and land resources
%K Optimal allocation
%K Comparison and analysis<br>流域
%K 水土资源
%K 优化配置
%K 比较分析
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=B5EDD921F3D863E289B22F36E70174A7007B5F5E43D63598017D41BB67247657&cid=B47B31F6349F979B&jid=9DEEAF23637E6E9539AD99BE6ABAB2B3&aid=E62D760B30DC24F1&yid=A732AF04DDA03BB3&vid=771469D9D58C34FF&iid=0B39A22176CE99FB&sid=847B14427F4BF76A&eid=23104246A5FCFCEF&journal_id=1007-7588&journal_name=资源科学&referenced_num=2&reference_num=38