| 畦面微地形时空变异分布状况试验研究 |
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| 引用本文： | 白美健,许迪,李益农,李福祥.畦面微地形时空变异分布状况试验研究[J].农业工程学报,2006,22(4):23-27. |
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| 作者姓名： | 白美健 许迪 李益农 李福祥 |
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| 作者单位： | 国家节水灌溉工程技术研究中心(北京)中国水利水电科学研究院,100044,北京 |
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| 基金项目： | 国家节水农业重大科技基金 |
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| 摘 要： | 畦面微地形时空变异分布状况对畦灌性能的影响较为显著，该文依据从典型试验畦块获得的畦面相对高程实测数据，借助统计学方法分析评价田间耕作措施和地面灌溉对畦面微地形时空变异分布状况的影响。结果表明：农田机耕、围畦打埂等田间耕作措施对畦面微地形整体分布状态和畦面相对高程空间分布状况的影响显著；而地面灌溉虽对畦面相对高程空间分布状况有一定影响，但对畦面微地形整体分布状态的影响却较小；田间耕作和地面灌溉等人为生产活动对较小规格畦块的畦面微地形时空变异分布状况的影响明显一些，围畦打埂和入畦单宽流量是影响土地精平后畦面微地形分布状况发生变化的主要影响因素；对较大规格的畦块，除上述影响因素外，还应关注机耕作业留下的车轮压痕对畦面平整状况产生的负面作用。
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| 关 键 词： | 微地形 畦面相对高程 时空变异性 耕作措施 地面灌溉 |
| 文章编号： | 1002-6819(2006)04-0023-05 |
| 收稿时间： | 2005-08-11 |
| 修稿时间： | 2005-11-06 |
Experimental study on spatial and temporal variability of microtopography |
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| Bai Meijian,Xu Di,Li Yinong and Li Fuxiang.Experimental study on spatial and temporal variability of microtopography[J].Transactions of the Chinese Society of Agricultural Engineering,2006,22(4):23-27. |
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| Authors: | Bai Meijian Xu Di Li Yinong and Li Fuxiang |
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| Institution: | National Center of Efficient Irrigation Engineering and Technology Research, China Institute of Water Resources and Hydropower Research, Beijing 100044, China |
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| Abstract: | The spatial and temporal variability of microtopography influences obviously the basin irrigation performance. Based the observation of surface relative elevation(SRE) from some typical fields, the effect of cultivation and surface irrigation on the spatial and temporal variability of microtopography at different field-geometry is evaluated by means of statistical methodology. Results indicate that the mechanical cultivation and building of border dikes have significant effects on both overall distribution of microtopography and spatial distribution of SRE for precise land-leveled, while surface irrigation, to a certain extent, makes an impact on the spatial distribution of SRE, but small effect on the overall distribution of microtopography. For small fields, the effect of cultivation and surface irrigation on the spatial variability distribution of microtopography could be more evident, in which the building of border dikes and inflow rate per unit width are two main factors to affect the variation of microtopography for precise land-leveled. For big fields, except the factors above mentioned, the negative function of dints remained by the mechanical farming on microtopogaraphy should also be considered. |
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| Keywords: | microtopography surface relative elevation (SRE) spatial and temporal variability cultivation surface irrigation |
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