%0 Journal Article
%T Spatial Pattern of Water Retetnion in Dujiangyan County<br>都江堰市水源涵养功能空间格局
%A FU Bin
%A XU Pei
%A WANG Yukuan
%A PENG Yi
%A REN Jing
%A <br>傅斌
%A 徐佩
%A 王玉宽
%A 彭怡
%A 任静
%J 生态学报
%D 2013
%I 
%X Evaluation of water retention importance of the ecosystem is one of the key elements of ecological assessment and planning. The importance of water retention not only reflects the level of water retention function of the ecological system, but also reflects the water demand for human life and production on a regional scale. Identification of a water retention importance area is of great significance for the establishment of water source protection planning, the implementation of integrated protection of land and water areas, water pollution treatment, and the protection of regional water resource security. In this paper, the assessment of water retention importance of Dujiangyan where there was hit by earthquake in 2008 was carried out by using the InVEST(Integrated Valuation and Tradeoffs of Ecosystem Services) model on a county scale, then the water retention importance was assessed by using the composite index method in combination with the flood mitigation capacity of vegetation and the distribution of water source protection area. The results showed that although water retention functions in some places of Dujiangyan were impaired because of Wenchuan earthquake, water retention functions in Dujiangyan City as a whole are still high. In some areas, the average amount of water retention is over 200mm/a. The very important water retention area of Dujiangyan covers an area of 421km2, and accounts for 34.9% of the total area of the city, which are much larger than the city's current water source protection area. Therefore, the protection of these very important areas should be further strengthened in the future, so as to ensure the water resource security of the city and the whole Chengdu Plain. The water retention functions and their importance show relatively obvious spatial variations, generally displaying a decreasing trend from northwest to southeast. Water retention importance is closely related to the distribution of water retention functions, but the case is not exactly the same. Therefore, on a county scale using the results of assessment of service function space to evaluate the importance can precisely reflect the spatial difference of water retention importance of ecosystems. However, this method can be improved by mapping the water demand of human.
%K ecosystem service
%K water retention function
%K water retention importance
%K InVEST
%K Dujiangyan<br>生态服务
%K 水源涵养功能
%K 水源涵养重要性
%K InVEST
%K 都江堰
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=FE163E5DB2274E5937319DE98913EC37&aid=213C4782C03C32B0FC15B05E8EA2E3FD&yid=FF7AA908D58E97FA&vid=27746BCEEE58E9DC&iid=38B194292C032A66&sid=7B927C26AC9ED104&eid=97747634025A5F36&journal_id=1000-0933&journal_name=生态学报&referenced_num=0&reference_num=36