Watershed variable isochrones method based on DEM

基于数字高程模型的流域变动等流时线方法

In this paper we derive the formulas for the isochrones in homogeneous and gradient media , and give some numerical resul .

本文推导了均匀和梯度介质中的等时线公式并计算了二维均匀和梯度介质中等时线的几何特征。

Lastly , a digital flow routing model has been established based on variable isochrones and the proposed variable isochrones method has applied for a small watershed .

最后，用变等流时线建立流域的汇流模型，并将其应用于一个缺乏资料的小流域。

Based on the feature of subgrade construction and with the analysis of the observed settlement data , a series of stress-strain isochrones are arranged in this paper .

本文基于高速公路路基填筑的特点，通过实测沉降资料的分析，整理出一系列应力应变等时曲线。

By using variable isochrones to compute the discharge hydrograph , the influence of watershed topography can bepresented , and the influence of rainfall can also be better reflected .

应用变等流时线进行流域的汇流计算，不但能够反映地形地貌对汇流的影响，而且能够较好地反映暴雨中心空间位置的变化对洪水流量过程的影响。