陇中黄土高原水土流失的人文因素分析

文章选取9个主要的人类活动指标因子,采用灰色系统理论与方法计算了人类活动与水土流失之间的关联度指数,探讨了人类活动对水土流失的干扰度,并以此为基础对陇中黄土高原进行水土流失生态分区。分区结果表明,兰州的人类活动综合干扰度大于12.0,是研究区人类活动干扰强度最大的区域;天水位居第二,干扰度在7.0~12.0之间;临夏、庆阳和平凉位居第三,干扰度在6.0~7.0之间;白银、定西两市是人类活动干扰程度相对最轻的区域,干扰度在5.0~6.0之间。据此,笔者因地制宜地提出了相应的分区治理模式。

Paritional Management Modes and Responding of Soil Erosion to Human Activity in Longzhong Loess Plateau

We selected nine main index about the human activity,and calculated the connection degree of human activity and soil erosion by the gray system theories,then discussed the disturbance degree of human activity to soil erosion.Based on these,the soil erosion ecosystem partition of Longzhong loess plateau was made.The results showed the comprehensive disturbance of human activity in Lanzhou was larger than 12.0,where disturbance degree was the biggest of all.Tianshui is the second,the comprehensive disturbance was at 7.0～12.0;Linxia,Qingyang and Pingliang resided the third,the comprehensive disturbance was at 6.0～7.0.Relatively,the disturbances of human activity in Baiyin and Dingxi were the most light and their comprehensive disturbance degrees were between 5.0and 6.0.On the grounds,homologous subarea management modeswere put forward in detail.