Water use measures are being implemented in irrigation areas to make better use of limited water resources and reduce adverse environmental impacts. A semi-analytical model is developed and tested with a numerical model to estimate changes in timing and magnitude of recharge from such measures in irrigation areas to support management of impacts, especially for areas with deep vadose zones and perched water tables. Low hydraulic conductivity of soil layers will lengthen time delays between actions and changes to recharge in addition to limiting the maximum recharge. Despite variations in detailed processes, the recharge outputs from models are surprisingly similar, irrespective of whether lateral effects are major. Superposition may be used to simplify the modelling of the total change in recharge from successive actions, including the initial development. Further simplification is possible, using an exponential conceptual model to approximate recharge responses to individual actions.

中文翻译：

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通过深渗流带模拟高效措施和增加灌溉开发对地下水补给的影响

灌溉区正在实施用水措施，以更好地利用有限的水资源，减少对环境的不利影响。开发了一个半解析模型并使用数值模型进行测试，以估计灌溉区此类措施的补给时间和大小的变化，以支持影响管理，特别是对于具有深渗流带和高位地下水位的地区。除了限制最大补给外，土壤层的低导水率还会延长行动和补给变化之间的时间延迟。尽管详细过程有所不同，但无论横向效应是否主要，模型的补给输出都惊人地相似。叠加可用于简化连续动作补给总变化的建模，包括最初的发展。进一步简化是可能的，使用指数概念模型来近似对单个动作的充电响应。