引黄滴灌滴灌器堵塞室内模拟试验研究

Experimental Study on Indoor Simulation of Drip Irrigation Emitter Block by Using Yellow River Water

针对内蒙古乌海市农林灌溉工程中滴灌带堵塞的问题,取用该地区引黄滴灌原水进行室内模拟试验,在不同水质及环境状况下研究滴灌器堵塞情况,分析滴灌器堵塞的主要影响因素。经6组对比试验研究确定,影响滴灌器堵塞的主要水质指标是浊度和微生物总数,且二者有很高的相关性;主要环境因子是水温。含沙量越大,灌水均匀度越小,滴灌器堵塞速度越快。温度越高,灌水均匀度变化幅度越大,进而对滴灌器流量的影响越明显。微生物(主要测定细菌总数)附着在泥沙颗粒上,与泥沙协同作用造成对滴灌器的堵塞;而浊度的增大和水温的升高促使微生物的数量增加。

According to the problem of blockage of drip irrigation tapes of agricultural and forestry irrigation engineering in Wuhai City of Inner Mongolia,this article used drip irrigation raw water from the Yellow River for indoor simulation experiment under the different water qualities and environment conditions and analyzed the main influencing factors of drip irrigation block,so as to provide the necessary conditions for the extension of dripping in Wuhai on a large scale. By the contrast experimental study on six groups,the main water quality factors affect the drip irrigation jam is turbidity and the total number of microorganisms and both has high correlation; the main environmental factor is temperature. The higher the sediment loads,irrigation uniformity value is smaller,the faster the drip irrigation machine jams. The higher the temperature,the greater the change of the irrigation uniformity will be,and thus affect the drip irrigation flow,the more obvious. Microorganisms( mainly the total number of bacteria) attached to the sediment particles,and silt synergy to the clogging of drip irrigation. The turbidity and the increasing of temperature increase in the number of the microbe.