闽北地区水土流失动态变化及其驱动机制研究

应用GIS的空间分析技术和径流小区实测方法，对阅北1985—2000年水土流失动态变化及其驱动机制进行了研究。结果表明，闽北山高坡陡的地形地貌因子是易发生水土流失的基本原因；变率大且强度大的降水和格状冲刷力强的径流进一步加强了引发水土流失的潜在动力；植被的退化，人类不合理的土地利用活动又加剧了自然侵蚀，并引发了新的水土流失。采取积极合理的预防与治理措施，可以有效地防止和减少该区的水土流失。

Dynamic Changes and Driving Mechanisms of Soil and Water Loss in North Fujian

By using GIS space analysis technique and performing runoff plot observation, research on soil erosion dynamic changes and its driving mechanisms was conducted from 1985 to 2000. Results show that steep slope and high elevation mountain are the two basic geomorphic factors causing soil and water loss in North Fujian Province. Greatly variable and intensive rainfall and runoff with strong scouring force further enhance the potential force for soil erosion. Vegetation degradation and the unreasonable landuse by human beings again aggravate natural soil erosion and induce new soil and water loss. Active reasonable measures for prevention and management can effectively prevent and reduce soil and water loss.