Controlled drainage is normally operated on a seasonal timescale to increase availability of water and to limit nutrient loss to surface water. It is conceivable that with more frequent, or even daily, management of the drainage base, controlled drainage can be both more efficient and effective. With the analytical successive steady state model presented here, rapid simulations of groundwater level and discharge as a function of time for a field under either regular or controlled drainage are feasible. The model includes effects of sudden changes in drainage base as well as damping and attenuation of dynamics by the unsaturated zone. It is validated against a numerical model and shows good agreement with numerical results. We demonstrate how this analytical model may facilitate anticipatory drainage base management based on ensemble weather forecasts, such that groundwater levels can be maintained at a theoretical optimal level.

中文翻译：

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地下水位优化的预期排水基础管理

受控排水通常在季节性时间尺度上运行，以增加水的可用性并限制地表水的养分流失。可以想象，通过更频繁甚至每天管理引流基地，受控引流可以更加高效和有效。使用此处介绍的分析连续稳态模型，可以快速模拟地下水位和流量随时间变化的场，无论是定期排水还是受控排水。该模型包括排水基础突然变化的影响以及非饱和带对动力学的阻尼和衰减。它针对数值模型进行了验证，并显示出与数值结果的良好一致性。