| 引用本文: | 李梦刚,孙兆军,焦炳忠,等.不同泥沙浓度及工作压力对微孔地下渗灌管渗水性能的影响[J].灌溉排水学报,0,():-. |
| Li Menggang,SUN Zhaojun,JIAO Bingzhong,et al.不同泥沙浓度及工作压力对微孔地下渗灌管渗水性能的影响[J].灌溉排水学报,0,():-. |
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| 不同泥沙浓度及工作压力对微孔地下渗灌管渗水性能的影响 |
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李梦刚1, 孙兆军2,3,4,5, 焦炳忠2, 韩磊6,7,8, 李兴强2, 李茜6,7,8
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1.宁夏大学土木与水利工程学院;2.1.宁夏大学土木与水利工程学院;3.2.宁夏大学环境工程研究院;4.3.教育部中阿旱区特色资源与环境治理国际合作联合实验室;5.4.宁夏（中阿）旱区资源评价与环境调控重点实验室;6.1.宁夏大学环境工程研究院;7.2.教育部中阿旱区特色资源与环境治理国际合作联合实验室;8.3.宁夏（中阿）旱区资源评价与环境调控重点实验室
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| 摘要: |
| 【目的】明晰灌溉水泥沙浓度和压力对微孔地下渗灌管渗水性能影响，为微孔地下渗灌管的田间应用提供依据。【方法】本研究对一种微孔地下渗灌管在0~100 kPa压力范围内，用自来水和浑水进行通水试验，分析压力和泥沙浓度对微孔地下渗灌管渗水性能的影响。【结果】（1）灌溉水泥沙浓度增加，渗水速率随通水时间延长持续降低；（2）不同泥沙浓度条件下，管道流态指数均大于1，相关系数R2大于0.98，渗水速率对压力变化敏感，并且，随着泥沙浓度的增加，管道渗水速率对压力的敏感程度增加。（3）进水口压力越小对灌溉水源的要求更高，高压力条件下可适当减缓灌溉水中泥沙给管道渗水性能带来的影响。【结论】灌溉水泥沙含量是影响微孔地下渗灌管渗水性能的主要因素，当泥沙浓度小于1.0 g/L时，增大灌溉系统压力可有效保障微孔地下渗灌管渗水性能。 |
| 关键词: 微孔渗灌管；泥沙浓度；渗水性能；渗水速率；变异系数 |
| DOI： |
| 分类号:S275.4 |
| 基金项目:宁夏大学研究生创新项目(GIP2019027)；宁夏重点研发计划重点项目(2018BFG02016)；宁夏重点研发计划(农业科技园区)资助项目(2017)；宁夏重点研发计划重点项目(2019BEF02002)； |
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| Effect of Sediment Concentration and System Working Pressure on Water Seepage Permeability of Microporous Subsurface Infiltration Irrigation Pipe |
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Li Menggang1, SUN Zhaojun2,3,4,5, JIAO Bingzhong2, HAN Lei6,7,8, LI Xingqiang2, LI Qian6,7,8
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1.School of Civil Engineering and Water Conservancy，Ningxia University;2.1.School of Civil Engineering and Water Conservancy，Ningxia University;3.2.Institute of Environmental Engineering Ningxia University;4.3.China－Arab Joint International Research Laboratory for Featured Resources and Environmental Governance in Arid Region;5.4.Key Laboratory of Resource Assessment and Environmental Control in Arid Region of Ningxia;6.1.Institute of Environmental Engineering Ningxia University;7.2.China－Arab Joint International Research Laboratory for Featured Resources and Environmental Governance in Arid Region;8.3.Key Laboratory of Resource Assessment and Environmental Control in Arid Region of Ningxia
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| Abstract: |
| 【Objective】Clarify the influence of irrigation water quality and pressure on the water seepage performance of microporous subsurface infiltration irrigation pipe to provide basis for its field application.【Method】In this study, a microporous subsurface infiltration irrigation pipe was tested with tap water and muddy water in the pressure range of 0~100 kPa, and the influence of pressure and sediment concentration on the water seepage performance of microporous subsurface infiltration irrigation pipe was analyzed.【Result】(1) With the increase of sediment concentration in irrigation water, the water seepage rate will continue to decrease with the extension of water flowing time.(2)The flow regime index of the pipeline is greater than 1, the correlation coefficient is greater than 0.98, the seepage rate is sensitive to pressure changes, and with the increase of the sediment concentration of irrigation water, the sensitivity of the seepage rate of the pipeline to pressure increases.(3) The lower pressure, the higher requirements for the quality of irrigation water. However, under high pressure conditions, the adverse effects of sediment in the irrigation water on the seepage performance of the pipeline can be moderately reduced.【Conclusion】Irrigation water sediment concentration is the main factor affecting the seepage performance of pipes. When the irrigation water source contains silt, increasing the pressure of irrigation system is an effective measure to ensure the water seepage performance of microporous subsurface infiltration irrigation pipe. |
| Key words: porous pipe；sediment concentration；the water seepage performance；Emission rate；variation coefficient |
