湘南红壤区不同林分类型涵水保土效益研究

通过对湘南丘陵区不同林分类型涵水保土效益的定位观测 ,分别对林地的产流量、产沙量、输沙率、最大涵水能力及保土效果进行了探讨 ,发现 :1CK坡面的地表径流系数比有林地的地表径流系数要大 1.0 4～ 1.2 1倍、林分质量越好的林地坡面的径流系数比林分质量较差的林地坡面的径流系数要小 ;2 CK坡面的产沙量、输沙率比有林地的产沙量、输沙率要大 2 .80～ 3.73倍、2 .5 8～ 3.2 6倍 ;林分质量越好的林地坡面的比林分质量较差的林地坡面的产沙量、输沙率要小 ;3湘南红壤区长江防护林的各种林分类型虽然还处于幼龄林阶段 ,但其林地的保土、涵水能力还是比较强的 ,其林地土壤的涵水能力为 CK的 1.5 6～ 3.0 8倍、保土能力在 386 0 t/ (km2 · a)～ 4 390 t/(km2 · a)

从洪涝灾害看森林涵水保土与可持续发展的关系——兼论今后生态建设的意见

从森林涵养水源，保持水土和可持续发展的观点论述了我国发生洪涝灾害的原因和规律，提出了要把发展林业当作治国治水的大计对待，并就林业的可持续发展提出了相应的对策。

Study of soil and water conservation Function on Slope with Different Planting Patterns for a Typical Small Watershed in Karst Region of Guizhou Province

Ten runoff plots with different planting patterns were established for experimental observation in Yangjichong small watershed of Longli County in Karst region of Guizhou Province. Results show that under the same rainfall condition, shrub land, natural grassland and abandoned land presented the best function of soil and water conservation. The function of soil and water conservation was poor for arbor planting pattern, because the shrub layer, herb layer and forest floor were not formed. Because of no-tillage, surface crust and other effects, the function of soil and water conservation in slope farmland was better than that in runoffplots with arbor planting pattern.