| 申红彬,徐宗学,李其军,张书函.基于Nash 瞬时单位线法的渗透坡面汇流模拟[J].水利学报,2016,47(5):708-713 |
| 基于Nash 瞬时单位线法的渗透坡面汇流模拟 |
| Simulation of rainfall runoff on permeable slope based on Nash instantaneous unit hydrograph |
| 投稿时间：2015-08-20 |
| DOI：10.13243/j.cnki.slxb.20150885 |
| 中文关键词: 渗透坡面 Nash瞬时单位线 参数n、K 汇流模拟 |
| 英文关键词: permeable slope Nash instantaneous unit hydrograph model parameters simulation of rainfall runoff |
| 基金项目:国家科技重大专项课题资助项目(2013ZX07304-001);国家自然科学基金项目(41301019) |
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| 中文摘要: |
| 基于Nash瞬时单位线法,结合Horton土壤入渗经验模型,并考虑植被对降雨的截流作用,建立了渗透坡面汇流计算的数学模型。以矩形坡面为研究对象,基于其汇流时间-面积特性,结合等流时线法,推导建立了Nash瞬时单位线参数n、K 的确定方法。其中,参数n 的值为1.0,K 的值与坡面汇流时间相等,相当于单一线性水库。应用本文建立的模型,对林地渗透坡面降雨径流进行计算,并与实测值进行比较。结果表明,计算值与实测值的变化趋势基本吻合,初步验证了本文方法的合理性。 |
| 英文摘要: |
| Based on Nash instantaneous unit hydrograph, Horton infiltration equation and rainfall interception models,a math model for simulating the rainfall runoff on permeable slope is established. The time-area relation of basin is a concentrated expression of geomorphic characteristics. Based on the time-area relation and isochrones of watersheds, a determination method of parameters n and K for Nash instantaneous unit hydrograph is derived in rectangular basin. The value of parameter n is equal to 1.0, and the value of K is equal to the routing time. Finally, the model is applied and examined in simulation of rainfall-runoff on forested permeable slope in Miyun Reservoir watershed area in Beijing. The result shows that the trends of the calculated and measured values are consistent well. |
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