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首页> 外文期刊>Irrigation and Drainage >Application of soil-water-atmosphere-plant model to assess performance of subsurface drainage system under semi-arid monsoon climate.
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Application of soil-water-atmosphere-plant model to assess performance of subsurface drainage system under semi-arid monsoon climate.

机译：应用土壤-水-大气-植物模型评估半干旱季风气候下地下排水系统的性能。

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摘要

The Soil-Water-Atmosphere-Plant (SWAP) model was evaluated for its capability to predict groundwater table behaviour under drained conditions for a semi-arid monsoon climate in the state of Haryana (India). SWAP simulated and observed values ranging within absolute deviation of 0.17-0.18 m for groundwater table, 0.87-1.07 mm day-1 for drainage discharge rate and 7.8-39.4 mm for cumulative drain discharge. The calibrated and validated model was used to predict excess water stress utilizing the SEW30 index, which is the sum of daily exceedances (cm) of the groundwater table depth above the depth of 30 cm below the soil surface for different spacing under varying rainfall situations. The maximum annual SEW30 of 5 years having all the combinations of rainfall was 297.0 cmday with drains spaced at 75 m, 92.7 cmday with drains spaced at 50 m and 15.1 cmday for drains spaced at 25 m. These results reveal that there would be no aeration problem with drains spaced at 25 m in all the years and in years with below normal rainfall in all of the test spacing. Long-term simulations revealed that there is no residual effect of a year's rainfall pattern on the groundwater table during the next year under drained conditions.
机译：针对哈里亚纳邦（印度）的半干旱季风气候，评估了土壤-水-大气-植物（SWAP）模型在排水条件下预测地下水位行为的能力。 SWAP的模拟值和观测值在地下水位的绝对偏差范围内为0.17-0.18 m，对于排水速率的偏差为0.87-1.07 mm day -1 ，对于累积排水量的偏差为7.8-39.4 mm。经过校准和验证的模型用于利用SEW 30 指数预测过量水分胁迫，该指数是土壤表层以下30 cm深度以上地下水位每日超标（cm）的总和在不同的降雨情况下具有不同的间距。所有降雨组合下5年的年度SEW 30 的最大值为297.0 cmday，排水管间距为75 m; 92.7 cmday，排水管间距为50 m; 15.1 cmday，排水管间距为25 m。这些结果表明，在所有年份和所有测试间隔中降雨低于正常水平的年份中，排水沟的间距为25 m不会出现通气问题。长期模拟显示，在排水条件下，明年的一年降雨模式对地下水位没有残留影响。

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