以贵州省猫跳河流域为例,运用环境经济学理论和方法,分析土壤侵蚀的经济损失内在机制,估算土壤侵蚀的经济损失,揭示土壤侵蚀经济损失分布的空间格局,为该区域水土流失防治提供科学依据。结果表明,研究区平均每年土壤侵蚀经济损失为36602.44×10^4元,其中土壤养分损失占总损失的89.46%,土地废弃损失占总损失的4.64%,土壤水分损失占总损失的1.05%,泥沙损失占总损失的4.85%。旱地土壤侵蚀经济损失最大,占土壤侵蚀经济损失的61.94%。从各县来看,清镇市土壤侵蚀经济损失最大,占总经济损失的32.87%。研究区平均单位面积经济损失为1174.86元/hm^2,北部地区和西南部地区土壤侵蚀单位面积经济损失价值较大。推进水土流失治理,实行生态补偿制度势在必行。:
Taking Maotiaohe watershed in Guizhou province as study area, the mechanism of soil erosion was analyzed by applying basic principles and methodology of environmental economics. The economic loss of soil erosion was estimated, and the spatial distribution of economic loss caused by soil erosion was revealed, which provides scientific basis for soil and water prevention and sustainable development of the study area. The result showed that the total economic loss of soil erosion reached 36 602.44 × 10^4 Yuan, and the losses of soil nutrient, abandoned land, water and sediment accounted for 89. 46%, 4. 64%, 1.05 %, 4.85 %, respectively. Among land use types, economic loss of soil erosion was the highest in dry land, accounting for 61.94% of the total loss. Among all counties, the economic loss caused by soil erosion was the highest in Qingzhen City, accounting for 32. 87% of the total. The economic loss per unit area in the study area was 1 174.86 Yuan/hm^2 , and was higher in the north and southwest of the study area. Ecological compensation should be put in practice in order to prevent the soil erosion and water loss.