CHEN Ya-lin,CHANG Xue-li,CUI Bu-li.Analysis of Impacts of Land-use Change on Runoff in Typical River Basin in Shandong Peninsula[J].Research of Soil and Water Conservation,2007,14(01):104-107.
山东半岛典型流域土地利用变化对径流的影响分析
- Title:
- Analysis of Impacts of Land-use Change on Runoff in Typical River Basin in Shandong Peninsula
- Keywords:
- land-use change; runoff; effect evaluate; Dagujia River basin
- 分类号:
- F301.24
- 摘要:
- 采用3S技术，根据1：250000地形图生成DEM，确定出大沽夹河流域的边界，以烟台市1986年、1992年和2000的ETM影像为基础信息源，分析了1986~1992年和1992~2000年两个时期的土地利用变化，建立了两个时期的径流量与降雨量的回归方程。研究结果表明，1986~1992年间，果园和居民地分别增加了14286.99hm2和5363.63hm2，仅农村居民地与城镇分别增加了100%和138.10%。其中，由农田转化为果园的面积最大，为10754.35hm2，占果园增加量的75.27%，而居民地主要由果园和农田转化而来，其中842.40hm2是由果园转化而来，4093.14hm2是由农田转化而来，分别占居民地增加量的15.71%和76.31%；与此同时，农田和有林地的面积却分别减少了14108.46hm2和9383.13hm2，分别主要转化为果园、有林地和农田，仅水浇地就比1986年减少了23%。1992~2000年间，果园的增幅比1986~1992年间增大，居民的增幅降低，有林地的减幅却比1986~1992年间明显增大，减少了25.54%。两个时期的径流量与降雨量分别呈线性回归关系和对数回归关系，1986~1992年这一时期的土地利用变化对径流的影响与降雨量的变化是同向的，而1992~2000年期间土地利用变化对水的需求降低，有利于径流量的增加。
- Abstract:
- The authors determined the boundary of Dagujia river basin based on 3S technology (DEM was made based on the relief map with the scale of 1∶250000), analyzed the land-use change during 1986～1992 and 1992～2000 and built the regression equation of runoff and rainfall in the two periods. The results showed that, among 1986 to 1992, the orchard area and residential area had increased 14286.99 hm2 and 5363.63 hm2 respectively. The rural area and urban area had increased 100% and 138.10% respectively. 10754.5 hm2 were converted from cropland to orchard, which was 75.27% of the increasing of orchard. Residential area was mainly converted from orchard and cropland, among which 842.40 hm2 was converted from orchard and 4 093.14 hm2 was converted from cropland, which were 15.71% and 76.31% of the increasing of residential area respectively. Meanwhile, the cropland and woodland had reduced 14 108.46 hm2 and 9 383.13 hm2 respectively, which were mainly convert to orchard, woodland and cropland, among which the irrigated cropland area had reduced 23% comparing with 1986.Among 1992~2000, the amplitude contraction of orchard increased significantly, and the amplitude contraction of residential area reduced. But the amplitude contraction of woodland increased significantly, reducing 25.54%. The relationship between runoff and rainfall in the two periods were linear regression and logarithm regression respectively. The impacts of land-use change and rainfall on runoff during 1986～1992 period were homonymous. The runoff increased during 1992～2000 period because of the reduction of water requirement caused by land-use change.
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备注/Memo
收稿日期:2006-3-1;改回日期:。
基金项目:鲁东大学校基金项目（20053201）；山东省教育厅项目（J01H03）；山东省自然基金项目（Z2003E01）资助
作者简介:陈雅琳（1981- ），女，山东省莱阳市人，硕士研究生，研究方向：景观生态学。