2种滴灌带灌水均匀度对铺设长度和进水压力的响应
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摘要
【目的】探究滴灌带进水压力和铺设长度对灌水均匀度的影响。【方法】以内嵌式滴灌带和薄壁式滴灌带为研究对象,比较了4种滴灌带铺设长度和4种进水压力交互作用下的灌水均匀度。【结果】内嵌式滴灌带的灌水均匀度较薄壁式滴灌带表现更好,且更适合于较长距离铺设使用。建立了2种滴灌带灌水均匀度与滴灌带铺设长度和进水压力的数学回归模型,并利用回归方程寻优发现内嵌式滴灌带滴灌均匀度达到0.95以上的优化铺设长度和进水压力的组合为:铺设长度60.02~109.94 m,进水压力0.09~0.2 MPa;薄壁式滴灌带的优化铺设长度和进水压力的组合为:铺设长度60.05~92.67 m,进水压力0.05~0.2 MPa。【结论】在设计田间滴灌系统时2种滴灌带的铺设长度和进水压力应在上述范围内选取,以保证灌水均匀度满足要求。
【Objective】Investigate the influence of inlet pressure and laying length on the drip irrigation uniformity.【Method】The embedded drip irrigation belt and the thin-wall drip irrigation belt were used as the research objects, and the uniformity of drip irrigation under 4 kinds of inlet water pressure and 4 kinds of laying length was compared.【Result】The uniformity of drip irrigation of embedded drip irrigation was better than thin-wall drip irrigation, and the embedded drip irrigation was suitable for long distance. The mathematical models of the relationship between the irrigation uniformity and the laying length and the inlet water pressure of the two types of drip irrigation belts were established. The optimal combination of the laying length and the inlet water pressure whose irrigation uniformity was more than 0.95 was found by using the optimization of the regression equation that the laying length of embedded drip irrigation belt was 60.02~109.94 m, and inlet water pressure was 0.09~0.20 MPa; The laying length of thin-wall drip irrigation belt was 60.05~92.67 m, and inlet water pressure was0.05~0.20 MPa.【Conclusion】Therefore, when designing the field drip irrigation system, the laying length and the inlet water pressure of the two types of drip irrigation belts should be selected in the above range to ensure the uniformity of irrigation.
【Objective】Investigate the influence of inlet pressure and laying length on the drip irrigation uniformity.【Method】The embedded drip irrigation belt and the thin-wall drip irrigation belt were used as the research objects, and the uniformity of drip irrigation under 4 kinds of inlet water pressure and 4 kinds of laying length was compared.【Result】The uniformity of drip irrigation of embedded drip irrigation was better than thin-wall drip irrigation, and the embedded drip irrigation was suitable for long distance. The mathematical models of the relationship between the irrigation uniformity and the laying length and the inlet water pressure of the two types of drip irrigation belts were established. The optimal combination of the laying length and the inlet water pressure whose irrigation uniformity was more than 0.95 was found by using the optimization of the regression equation that the laying length of embedded drip irrigation belt was 60.02~109.94 m, and inlet water pressure was 0.09~0.20 MPa; The laying length of thin-wall drip irrigation belt was 60.05~92.67 m, and inlet water pressure was0.05~0.20 MPa.【Conclusion】Therefore, when designing the field drip irrigation system, the laying length and the inlet water pressure of the two types of drip irrigation belts should be selected in the above range to ensure the uniformity of irrigation.
引文
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[10]张林,吴普特,范兴科,等.低压滴灌灌水均匀度试验研究[J].西北农林科技大学学报(自然科学版),2009,37(12):207-212.
[11]马晓鹏,龚时宏,王建东,等.常压灌水器在低压条件下水力性能试验研究[J].灌溉排水学报,2009,28(5):7-9.
[12]牛文全,吴普特,范兴科.低压滴灌系统研究[J].节水灌溉,2005(2):29-30,32.
[13]张林,范兴科,吴普特.低压条件下滴灌灌水均匀度试验研究[J].灌溉排水学报,2008,27(5):22-24.
[14]GB/T50485—2009,微灌工程技术规范[S].北京:中国计划出版社,2009.
[15]常凤生,张顶山.关于滴灌均匀度问题的探讨[J].东北水利水电,2003,21(12):38-39.
[16]刘玉春,吴现兵,刘宏权,等.内镶式滴灌带水力性能试验研究[J].河北农业大学学报,2011,34(2):131-135.
[17]范兴科,吴普特,牛文全,等.低压滴灌条件下提高系统灌水均匀度的途径探讨[J].灌溉排水学报,2008,27(1):18-20.
[18]王建众.滴灌灌水均匀性试验研究[D].杨凌:西北农林科技大学,2008.
[19]王霞,崔春亮,阿不都·沙拉木,等.不同类型滴灌带灌水均匀度田间试验分析[J].节水灌溉,2012(8):12-15.
[20]曹建东,陈佰鸿,王利军,等.不同类型滴灌带灌水均匀度的田间测试分析[J].节水灌溉,2010(8):27-30,33.
[21]张国祥,吴普特.滴灌系统滴头设计水头的取值依据[J].农业工程学报,2005,21(9):20-22.
[22]王栋.内镶扁平紊流压力补偿式滴头的研制[J].节水灌溉,2007(1):36-37.
[2]常凤生.滴灌均匀度的影响因素及提高措施[C]//石家庄:第六次全国微灌大会论文集,2004:125-127.
[3]朱德兰,吴普特,张青峰,等.微地形影响下滴灌均匀度设计指标研究[J].排灌机械,2006,24(1):22-26.
[4]罗春艳.滴灌灌水均匀度影响因素及计算方法[D].杨凌:西北农林科技大学,2014.
[5]张天举,仵峰,邓忠,等.不同坡度下压力对滴灌毛管均匀度的影响试验[J].水利水电科技进展,2007,27(3):24-26.
[6]朱德兰,吴普特,王剑.滴头制造偏差对灌水均匀度及毛管造价的影响[J].排灌机械工程学报,2011,29(2):175-179.
[7]王海军.紊流迷宫内镶式滴头制造偏差对田间管网技术指标的影响研究[D].西安:西安理工大学,2010.
[8]罗春艳,牛文全.滴头堵塞率及堵塞位置对灌水均匀度的影响[J].干旱地区农业研究,2014,32(2):196-200.
[9]王栋.高灌水均匀度防堵塞内镶贴片式地下灌水器设计研制及试验研究[J].节水灌溉,2007(2):54-57.
[10]张林,吴普特,范兴科,等.低压滴灌灌水均匀度试验研究[J].西北农林科技大学学报(自然科学版),2009,37(12):207-212.
[11]马晓鹏,龚时宏,王建东,等.常压灌水器在低压条件下水力性能试验研究[J].灌溉排水学报,2009,28(5):7-9.
[12]牛文全,吴普特,范兴科.低压滴灌系统研究[J].节水灌溉,2005(2):29-30,32.
[13]张林,范兴科,吴普特.低压条件下滴灌灌水均匀度试验研究[J].灌溉排水学报,2008,27(5):22-24.
[14]GB/T50485—2009,微灌工程技术规范[S].北京:中国计划出版社,2009.
[15]常凤生,张顶山.关于滴灌均匀度问题的探讨[J].东北水利水电,2003,21(12):38-39.
[16]刘玉春,吴现兵,刘宏权,等.内镶式滴灌带水力性能试验研究[J].河北农业大学学报,2011,34(2):131-135.
[17]范兴科,吴普特,牛文全,等.低压滴灌条件下提高系统灌水均匀度的途径探讨[J].灌溉排水学报,2008,27(1):18-20.
[18]王建众.滴灌灌水均匀性试验研究[D].杨凌:西北农林科技大学,2008.
[19]王霞,崔春亮,阿不都·沙拉木,等.不同类型滴灌带灌水均匀度田间试验分析[J].节水灌溉,2012(8):12-15.
[20]曹建东,陈佰鸿,王利军,等.不同类型滴灌带灌水均匀度的田间测试分析[J].节水灌溉,2010(8):27-30,33.
[21]张国祥,吴普特.滴灌系统滴头设计水头的取值依据[J].农业工程学报,2005,21(9):20-22.
[22]王栋.内镶扁平紊流压力补偿式滴头的研制[J].节水灌溉,2007(1):36-37.