黄土高原地区淤地坝坝系相对稳定研究

本文阐述了淤地坝坝系相对稳定的内涵和标准，在此基础上分析了天然聚湫和不同类型地区的坝系相对稳定系数，并初步探讨了不同类型地区洪量模数、土壤侵蚀模数和稳定系数的关联性，研究表明流域洪量模数、土壤侵蚀模数均与坝系稳定系数呈较好的线性关系，坝系相对稳定系数随流域洪量模数和土壤侵蚀系数的增大而增大。且以延安市淤地坝建设为例，分析研究了坝系相对稳定的骨干坝与中小型坝的配置比问题。

Study on relative stability of check dam system

The connotation and standard of relative stability of check dam system are demonstrated. Based on the analysis on stability coefficients of natural silted dam formed by slope sliding and check darns in loess region of China, the relationships between stability coefficient and flood modulus as well as erosion modulus are investigated. It is found that these relationships are linear and the stability coefficient increase with the increase of the flood modulus and erosion modulus. The arrangement scheme of check dams in Yanan City is taken as an example to demonstrate how to allocate the trunk dams and middle size or small size dams to achieve the relatively stable of the check dam system.