鲁中南降雨因子对不同种植下坡耕地产流产沙影响的灰色关联分析

Grey Relational Analysis on the Effects of Rainfall Factors on Runoff and Sediment in the Sloping Farmland with Different Plants in the Central South of Shandong Province

[目的]探讨鲁中南山区影响不同种植下坡耕地产流产沙的主要降雨因子。[方法]通过对鲁中南山区不同种植下降雨因子与径流泥沙量的灰色关联分析,研究不同种植下不同降雨因子对径流量、泥沙量影响的主次关系。[结果]不同种植类型下,不同降雨因子对径流量和泥沙量影响的关联序并不一致。降雨量是影响径流量的主导因子,而在自然草地径流小区,PI30对径流量的影响最大;降雨强度是影响泥沙量的主要因子,而在沙打旺径流小区,PI对泥沙量的影响最大。在花生径流小区和自然草地径流小区,复合因子对径流量、泥沙量的影响最小;在沙打旺径流小区,降雨强度对径流量的影响最小,而复合因子对泥沙量的影响最小。[结论]该研究为当地坡面水土流失综合治理以及土地的优化利用和可持续发展提供了理论依据。

[Objective] The aim was to study the main rainfall factors influencing runoff and sediment in the sloping farmland with different plants in the central south of Shandong Province.[Method] Through grey relational analysis,the effects of different rainfall factors on runoff and sediment with different plants in the central south of Shandong were studied.[Result] In the sloping farmland with different plants,the effects of rainfall factors on runoff and sediment weren＇t consistent.Rainfall was the dominant influencing factor of runoff,but PI30 had the greatest influence on runoff in natural grassland.Meanwhile,rainfall intensity was the main influencing factor of sediment,but PI had the greatest influence on sediment in Astragalus adsurgens Pall.plot.The compound factor had the least influence on runoff and sediment in Arachis hypogaea plot and natural grassland.In A.adsurgens Pall.plot,rainfall intensity had the minimal impact on runoff,but the compound factor had the least effect on sediment.[Conclusion]The study could provide theoretical references for the comprehensive control of slope soil erosion,the optimum utilization and sustainable development of land.