|
|
|
| Measure system of runoff control in Loess Region |
| Zhao Kerong<sup>1</sup>,Chen Lihua<sup>2</sup>,Xiao Yang<sup>2</sup> |
| 1.Control office of Guanchuan Basin in Dingxi City of Gansu Province,743000,Dingxi,Gansu;2.Key Lab.of Soil & Water Conservation and Combating Desertification,Ministry of Education,College of Soil and Water Conservation,Beijing Forestry University,100083,Beijing: China |
|
|
|
|
Abstract The development of economy and society was restricted severely by the drought,soil erosion and water loss in Dingxi City of Gansu Province.So the key problem is how to use water resource and prevent soil and water loss efficiently.Based on the theory of runoff control,this paper presented the measure system of runoff control,which was used in the Jiuhuagou catchment of Anding district of Dingxi city.The results show that water resource was utilized efficiently and soil and water loss was also controlled effectively,the regional economy was developed persistently through runoff control in the periods of five years.Percentage of vegetation coverage and land use increased from 24% to 57.1% and from 63% to 81.7%,respectively.Soil erosion modulus decreased from 5 400 to 915 t/(km<sup>2</sup>·a)and conservation degree of catchment increased from 44.9% to 86.3%.Total income of watershed and average net income of per farmer raised from 5.02 million yuan to 14.05 million yuan and from 757 yuan to 1 486 yuan,respectively.Crop yield per person increased from 427 to 654 kg.Contribution percentage of science and technology with measures of runoff control was 56.71% on the total increment of total agriculture production value.Measures of runoff control played the key effect to getting rid of poverty and becoming rich for farmer in the catchment.
|
|
Received: 07 September 2007
|
|
|
|
|
|
|
