| 蒸发影响下农田排水沟(管)间距的计算 |
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| 引用本文： | 马英杰,沈冰,虎胆·吐马尔拜. 蒸发影响下农田排水沟(管)间距的计算[J]. 水利学报, 2006, 37(10): 1264-1269 |
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| 作者姓名： | 马英杰 沈冰 虎胆·吐马尔拜 |
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| 作者单位： | 新疆农业大学,水利与土木工程学院,新疆,乌鲁木齐,830052;西安理工大学,水利水电学院,陕西,西安,710048;西安理工大学,水利水电学院,陕西,西安,710048;新疆农业大学,水利与土木工程学院,新疆,乌鲁木齐,830052 |
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| 基金项目： | 国家自然科学基金;新疆农业大学校科研和教改项目 |
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| 摘 要： | 本文根据水量平衡原理建立考虑蒸发影响的地下水位下降的表达式，通过对设定的潜水下降速度函数V，应用泰勒公式展开并采用优化拟合的方法，分别得到取展开式前4项和前3项的作为简化的排水计算公式。应用该两公式对2种土壤的排水沟(管)间距进行了计算，通过与已被验证的实例计算数据对比，证明本文提出的计算有较高精度。结果表明：蒸发影响下的农田排水沟(管)间距比仅考虑排水作用时放大14.35～30.76m，潜水蒸发对排水沟间距有较大的影响。
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| 关 键 词： | 潜水蒸发 泰勒公式 优化拟合 排水沟间距 |
| 文章编号： | 0559-9350（2006）10-1264-06 |
| 收稿时间： | 2005-09-28 |
| 修稿时间： | 2005-09-28 |
Spacing of drainage ditches in field under the influence of evaporation |
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| MA Ying jie. Spacing of drainage ditches in field under the influence of evaporation[J]. Journal of Hydraulic Engineering, 2006, 37(10): 1264-1269 |
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| Authors: | MA Ying jie |
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| Affiliation: | Xinjiang Agriculture University, Urumchi 830052, China |
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| Abstract: | Based on the principle of equilibrium of water amount, an expression desribing the dropping down of groundwater table in consideration of evaporation is established. The function V expressing the dropping down speed of phreafic level is expanded into series by means of Taylor formula so that the expression can be simplified by the sum of the first four terms or first three terms of the series. The formula is applied to calculate the optimized spacing of drainage ditches in field for two kinds of soil. The validity of the calculated suitable spacing is verified by examples given by literatures. It is concluded that the spacing of drainage ditches will be enlarged by 14.35 - 30.76m, if phreatic evaporation is taken into account. |
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| Keywords: | phreatic evaporation Taylor formula optimum fitting spacing of drainage ditches |
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