| 摘要: |
| [目的]定量评价影响渭河流域产水、产沙的地理环境要素因子,为渭河流域产水、产沙格局划分及流域生态环境建设提供理论依据.[方法]分析渭河流域主要支流产水、产沙对年降雨量(P)、植被净初级生产力(NPP)、泥沙中数直径(D50)等地带性因子之间的响应机制.[结果]流域产水、产沙模数与以上3种因子之间均存在明显的非线性关系.采用回归分析得到了流域产水、产沙与地带性因子之间的多元回归模型.[结论]建立了渭河流域产水、产沙与地理环境要素之间的多项式回归模型. |
| 关键词: 地理环境要素 产水产沙 渭河流域 |
| DOI： |
| 分类号:S157.1 |
| 基金项目:中国科学院"西部之光"资助项目，国家重点基础研究发展规划(973计划)，中国科学院西部行动项目? |
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| Research of quantitative relations between Geographical environment factor and water and sediment in the Weihe River basin |
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ZHANG Yu-xian WANG Fei MU Xing-min
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| Abstract: |
| 【Objective】 The research quantified the effects of geographical environment factors about runoff and sediment generation to provide rationable foundation to differentiate cell of runoff and sediment generation and to the construction of ecological environment in a watershed.【Method】 This article analyzed response mechanisms of runoff and sediment in main branches of annual rainfall (P),vegetation spatial distribution (NPP),the silt median diameter (D50) and so on.【Result】 The result showed the non-linear relation existed between runoff and sediment generation modulus and the three environment factors mentioned above.And based on the multiple regression analysis method,a multi-dimensional regression model between runoff and sediment and regional factor was found. 【Conclusion】 This article established dualistic regressive model between runoff and sediment generation modulus and environment factors. The model will certainly provide rationable foundation to the research of runoff and sediment generation in the Weihe River basin. |
| Key words: geographical environment factor runoff and sediment generation Weihe River basin |
