当草地地面覆盖达90%时，草被拦蓄径流效益达90%以上，而基本上无侵蚀发生。
When surface cover of natural grassland reaches 90%, the benefits for grass reducing surface runoff is above 90% and not any erosion occurs.
简要介绍了人工神经网络用于洪水预报的基本原理，对降雨径流预报的网络模型进行了改进。
This article presents the principle of ANN briefly in the application of flood forecast and an improved network algorithm of rainfall runoff forecasting.
WEPP模型对径流量的模拟结果基本可以接受，而模型对土壤侵蚀量的模拟值出现了一定偏差。
Predicted runoff by WEPP was accepted, but predicted soil loss was a little far from the measured values.
计算结果表明，在五十年代丰水期降雨量大于蒸发量，降水、蒸发、径流三者之间基本上平衡。
In the high flow period of 1950's, the rainfall is more than evaporation, the relationship a-mong precipitation, run-off and evaporation was in balance.
根据HBV水文模型的基本原理，建立了西北干旱区内陆河出山径流概念性水文模型。
Based on the basic principle of the HBV conceptual hydrological model, a hydrological model of the mountainous watersheds in the arid inland area of northwest China was developed by the authors.
径流和土壤是引起水土流失的两个基本因子，采用原状土冲刷法和实地放水冲刷法对北京市八达岭林场油松林地进行土壤抗冲性研究。
The anti-scouring feature of forest land soil was examined by using the undisturbed soil sample washing experiment and the spot washing experiment.
该方程组基本上揭示了树干径流的规律，从实验与模拟结果对比分析中得到了佐证。
The equation set shows the law of stemflow, it was proven by the comparative analysis of stemflow experiment and relevant simulation.
转换到原型小流域的坡面径流变化过程基本能够反映实际情况；
The converted rainfall is heavy rainstorm, and the converted process of flow can show practical condition of prototype watershed.
转换到原型小流域的坡面径流变化过程基本能够反映实际情况；
The converted rainfall is heavy rainstorm, and the converted process of flow can show practical condition of prototype watershed.
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