[目的] 对江苏省水土保持功能重要性进行评价,为水土保持功能区划和水土保持治理措施布局提供重要依据. [方法] 根据江苏省自然环境、社会经济、土地利用和水土流失特征,选取土壤保持、农田防护、水质维护和人居环境维护4项水土保持功能进行重要性及其空间分布特征的评价,并进行综合评价. [结果] 江苏省水土保持功能重要性程度较高,极重要区和中等重要区分别占全省总面积的42.10%和46.44%;苏北地区主要水土保持功能是土壤保持和农田防护,苏中地区主要水土保持功能是农田防护和水质维护,苏南地区主要水土保持功能是水质维护和人居环境维护. [结论] 评价结果揭示了江苏省水土保持功能重要性等级及其空间分布特征.
[Objective] The importance of soil and water conservation function was evaluated in order to provide references for reasonable function division and measures of soil and water conservation in Jiangsu Province. [Methods] According to the characteristics of natural environment, social economy, land use and soil erosion in Jiangsu Province, the importance of soil and water conservation function and its spatial distribution were comprehensively evaluated. Four soil and water conservation functions including soil conservation, farmland protection, water quality maintenance and living environment maintenance was selected. [Results] The importance of soil and water conservation function in Jiangsu Province was at a higher level. The function area of utmost and moderate importance accounted for 42.10% and 46.44% of the total area, respectively. The main soil and water conservation functions were soil conservation and farmland protection in the northern of Jiangsu Province, farmland protection and water quality maintenance in the central, and water quality maintenance and living environment maintenance were in the southern of Jiangsu Province. [Conclusion] The evaluation results revealed the importance of soil and water conservation function and its spatial distribution.