|
|
|
| Effects of land-use change on the runoff in Qingganghe River Basin |
| Chen Yinzhen1,Cheng Jinhua1,Zhang Hongjiang1,Yin Jing2,He Fan2 |
| 1.College of Soil and Water Conservation,Beijing Forestry University,Key Lab.of Soil & Water Conservation and Desertification Combating of MOE,100083;2.Chinese Institute of Water Resources and Hydropower Research,100044:Beijing,China |
|
|
|
|
Abstract Land-use change has great influence on the occurrence of runoff.Based on the remote sensing data of 1987 and 2000,and nearly twenty years meteorological and hydrological data(1969—1987),SWAT was adopted to analyze the effect of landuse on runoff in Qingganghe River basin.Results showed that,compare to the land-use in 1987,annual runoff decreased under the land-use condition in 2000.And the distribution of monthly runoff is more rational under the land-use condition in 2000 by decreasing the monthly runoff from June to September and increasing that from October to May of next year.The value difference of annual runoff was not related to annual precipitation,but the value difference of average monthly runoff increased with precipitation.The results also showed that the land-use in 2000 is more beneficial for the protection of eco-environment of Qingganghe River Basin.
|
|
Received: 22 October 2008
|
|
|
|
|
|
|
