%0 Journal Article
%T The Changes and Their Interactions of Precipitation-Landscape-Runoff in Jinghe Watershed<br>流域宏观尺度降雨-景观-径流变化的相互作用
%A XIE Gao-di
%A ZHEN Lin
%A CHENG Cao-cao
%A YANG Li
%A <br>谢高地
%A 甄霖
%A 陈操操
%A 杨丽
%J 资源科学
%D 2007
%I 
%X The variation of precipitation, landscape patterns and stream runoff together with their interaction is an important issue in global change research in recent years. The paper investigates the interaction between variation of precipitation landscape patterns and runoff, and results show that: 1)Precipitation in upper-middle main Jinghe watershed over 40 years descends little, and the isograms of inclination rate of precipitation are between -4.9mm/10a to -11.3mm/10a. However, precipitation in Malian river sub-watershed remains no change or drops weekly;2) The landscape structure in the watershed does not change very much during 1986 to 2000, and grass land and arable land occupy more than 85% of the total watershed area. Forest and other land use occupy 10% and 5%. In the transformation of macro landscape structure, proportion of arable land in the upper-middle main Jinghe watershed increases, but arable land in the upper-middle Jinghe watershed of Malian river maintains stable; 3)Annual stream runoff in the upper-middle main Jinghe watershed declines obviously. The decreasing rate is 1.78m3/s every ten years. In the upper-middle Jinghe watershed of Malian river, annual stream runoff and runoff modulus almost have no change during the last 30 years. But in the whole watershed the stream runoff decreases; 4)Correlation between the corresponding stream runoff and precipitation each year is significant (P<0.01). In the upper-middle main Jinghe watershed, when precipitation reduces 10mm, relevant stream runoff may decline 70×108m3. And in Malian river sub-watershed, the value is 110×108m3. Therefore, if the structure of landscape patterns maintain unchanged, the trend of stream runoff and precipitation will be the same. Tiny variation in landscape pattern may lead to change extent of stream runoff which is in answer to precipitation. Furthermore, proportion of arable land increases in landscape patterns will reduce the stream runoff obviously.
%K Change of landscape
%K Change of climate
%K Change of stream runoff
%K Interactions
%K Jinghe watershed<br>泾河流域
%K 景观变化
%K 气候变化
%K 径流变化
%K 相互作用
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=B5EDD921F3D863E289B22F36E70174A7007B5F5E43D63598017D41BB67247657&cid=B47B31F6349F979B&jid=9DEEAF23637E6E9539AD99BE6ABAB2B3&aid=9EF418A29357A30E&yid=A732AF04DDA03BB3&vid=771469D9D58C34FF&iid=0B39A22176CE99FB&sid=3F0AF5EDBC960DB0&eid=D5C9DC4EF2F78008&journal_id=1007-7588&journal_name=资源科学&referenced_num=1&reference_num=10