A calculation model is established in the paper for determining the water use ensurance probability based on the statistic analysis of irrigation area inflow and water needed.

在对灌区来水和需水随机性分析的基础上，建立了一种确定灌区灌溉用水保证率的计算模型。

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This paper inserts grey system, makes use of finite time series, follows GM (1, 1) building method, builds the long term prediction model of total waste -water in Heilongjiang Province.

本文引入灰色系统理论，利用有限的时间序列，按照GM(1,1)建模方法，建立起黑龙江省污水总量长期预测模型。

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Using the PE Model, the canopy photosynthesis, evapotranspiration and water use efficiency (WUE) for different rice plant types were simulated.

利用PE模型，分别模拟了水稻前中期与后期不同株型的群体光合量、蒸散量以及水分利用效率。

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Bill Hunt,a professor of Biology and Agricultural Engineering at North Carolina State University, has developed an easy-to-use computer model to predict how landscape impacts water pollution.

VOA: standard.2010.08.04