• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文OA文献 >Emitter discharge variability of subsurface drip irrigation in uniform soils: effect on water-application uniformity
【2h】

Emitter discharge variability of subsurface drip irrigation in uniform soils: effect on water-application uniformity

机译：均匀土壤中地下滴灌的滴灌排放变化：对水均匀度的影响

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Emitter discharge of subsurface drip irrigation (SDI) decreases as a result of the overpressure in the soil water at the discharge orifice. In this paper, the variation in dripper discharge in SDI laterals is studied. First, the emitter coefficient of flow variation CVq was measured in laboratory experiments with drippers of 2 and 4 L/h that were laid both on the soil and beneath it. Additionally, the soil pressure coefficient of variation CVhs was measured in buried emitters. Then, the irrigation uniformity was simulated in SDI and surface irrigation laterals under the same operating conditions and uniform soils; sandy and loamy. CVq was similar for the compensating models of both the surface and subsurface emitters. However, CVq decreased for the 2-L/h non-compensating model in the loamy soil. This shows a possible self-regulation of non-compensating emitter discharge in SDI, due to the interaction between effects of emitter discharge and soil pressure. This resulted in the irrigation uniformity of SDI non-compensating emitters to be greater than surface drip irrigation. The uniformity with pressure-compensating emitters would be similar in both cases, provided the overpressures in SDI are less than or equal to the compensation range lower limit.
机译：地下滴灌（SDI）的排放物排放量由于排放孔处土壤水中的超压而降低。本文研究了SDI分支中滴头流量的变化。首先，在实验室实验中，将滴头分别为2 L和4 L / h的滴头分别放置在土壤上和土壤下，以测量流量变化系数CVq。另外，在埋入式发射器中测量土壤压力变化系数CVhs。然后，在相同的工作条件和均匀的土壤条件下，模拟了SDI和地表灌溉分支中的灌溉均匀性。沙质和肥沃的。对于表面发射器和地下发射器的补偿模型，CVq相似。但是，对于壤土中的2-L / h非补偿模型，CVq降低。由于发射器放电与土壤压力之间的相互作用，这表明SDI中可能发生非补偿性发射器放电的自我调节。这导致SDI非补偿性排放源的灌溉均匀性大于地表滴灌。如果SDI中的超压小于或等于补偿范围下限，则在两种情况下，压力补偿式发射器的均匀性将相似。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号