江苏省丘陵山区及平原沙土区水土流失综合治理及效益评估研究

通过近期重点工程规划实例分析江苏省水土流失综合治理措施及其效益,以期为今后的水保规划和综合治理提供借鉴。通过分析江苏省水土流失现状及特点,建立丘陵山区以小流域为单元的山、水、田、林、路综合治理措施体系,平原沙土区以小区域为单元的河、沟、堤、田、林、路综合治理措施体系,并规划各分区重点工程措施分布及工程量;在此基础上,进一步构建水土保持效益评价的指标体系及相应计算模型,进行规划措施的生态、经济、社会效益测算与分析。结果表明,全部措施生效当年可减蚀土壤1.38×106 t,拦蓄水1.27×108 m3;规划实施期末累计经济效益总额5 059.05万元,农民人均增收552.18元,效益显著。

Assessment of Comprehensive Soil and Water Loss Control and Its Benefits in Hilly Area and Sandy Plain Area of Jiangsu Province

This study aims at providing valuable references for soil and water conservation in the future through analyzing the comprehensive soil ad water loss control and evaluating its benefits in Jiangsu Province.By analyzing the characteristics and current situation of soil and water loss in Jiangsu Province,comprehensive control systems of hill,river,field,forest,and road for small watersheds in the hilly areas and river,ditch,embankment,fields wood,and road for small regions in the sandy plain areas have been established.The plans for key engineering measures distribution and their engineering amount in the areas are formulated.Based on the control systems,index system and the corresponding calculation model for the benefits evaluation of soil and water conservation were established to measure and analyze ecological,economical and social benefits of the planned measures.Results showed that all the control measures reduced soil erosion 1.384 6 million tons and water interception and storage 127.452 2 million cubic meters in the year when the measures became effective.Besides,50.590 5 million RMB economic benefits were turned out significantly at the final stage of plan implementation and farmers′ average per capital income increased by 552.18 RMB.