According to the change trend of rainfall in Weihe River Basin in Shaanxi, the paper established the scenario analysis method to predict the changes of runoff using distributed hydrological model.

结合渭河流域陕西片的降雨变化趋势，建立了运用分布式水文模型预测流域径流变化规律的情景分析方法。

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Disturbance of the bedrock changes drainage and runoff patterns, which may increase the rate of erosion. Trenching is the exploration activity that most disturbs bedrock.

干扰的基岩排水和径流的变化模式，这可能增加侵蚀率。挖沟是勘探活动，大部分干扰的基石。

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The impacts of climate change, groundwater overdraft, surface runoff and food production changes on water resources are analyzed.

分析了气候变化、地下水超采、地表径流及粮食产量变化等方面对水资源的影响。

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Those very herbicide-resistant plants, now grown on more than 220 million acres annually worldwide, have spurred the adoption of more environment-friendly herbicides and agricultural practices--changes that have markedly reduced soil erosion, the runoff of agricultural chemicals and carbon dioxide emissions, and increased yields.

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