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Effect of Travel Time on Management of a Sequential Reuse Drainage Operation

机译：行程时间对顺序回用排水作业管理的影响

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摘要

Sequential reuse of agricultural drainage water recovered in tile lines has been proposed as a strategy for reducing drainage volume in the western San Joaquin Valley of California. In this system, high-quality water is used to grow a salt-sensitive crop, and the drainage from this operation is collected by tile lines and subsequently used on a more salt-tolerant crop. This process is continued on progressively more salt-tolerant species until the final residual is collected and sent to evaporation ponds. In this paper we develop a transfer function model for simulating the drainage concentrations of each stage of a sequential reuse project. Transient salt concentrations are calculated for typical drain spacings and water management strategies, under the assumption that downward movement of water is eventually restricted by a subsurface barrier. Results of the calculations show that response times of fields managed in this way are extremely long, so that the drain lines primarily capture resident ground water for decades or more after the operation is started, especially if the barrier is assumed to be at a substantial depth below the surface. As a result, the system will never reach steady state in any practical period of time, and system design strategies based on steady state behavior will be flawed.
机译：已经提出了对在 管线中回收的农业排水进行连续再利用的方法，以作为减少加利福尼亚州圣华金河谷西部地区排水量的策略。在此 系统中，使用高质量的水来种植对盐敏感的 作物，并且通过tile 线收集来自此操作的排水然后用于耐盐性更高的作物。在越来越多的耐盐物种上继续进行此 过程，直到最终残留物被收集并送至蒸发 池中。在本文中，我们开发了一个传递函数模型，用于 依次模拟 重复使用项目各阶段的排水浓度。在假定水的向下移动最终受地下屏障限制的假设下，针对典型的排水间距和水管理策略，计算了瞬态盐浓度 。计算结果 显示以这种方式管理的场的响应时间非常长，因此排水管线主要捕获居民地水。手术开始后数十年或更长时间，尤其是 ，如果假定屏障位于 表面以下的较大深度处。结果，系统在任何实际时间内都不会达到稳态 ，并且基于稳态行为的系统设计策略 将会存在缺陷。

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  • 来源
    《Soil Science Society of America Journal》 |2003年第4期|1122-1126|共5页
  • 作者

    William A. Jury; Atac Tuli; John Letey;

  • 作者单位

    Dep. of Environmental Sci., Univ. of California, Riverside, CA 92521;

    Dep. of Environmental Sci., Univ. of California, Riverside, CA 92521;

    Dep. of Environmental Sci., Univ. of California, Riverside, CA 92521;

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