| 已建工程的滴灌节水率多数没有达到设计的节水效果 |
| 添加时间：2019/12/3 17:07:34 浏览次数： |
| 毋庸质疑，国内各级政府和用户采用滴灌的初衷就是看到这项技术具有显著的节水作用。文献报导与传统漫灌相比，滴灌可以省水50-80%，一亩漫灌的耗水量能满足2-4亩滴灌用水。滴灌有效避免了输水过程损失和深层渗漏损失，减少了地面蒸发和径流损失，在北方特别是西北没有灌溉就没有农业的干旱地区，推广滴灌的意义不言而喻。 There is no doubt that the original intention of domestic governments and users to adopt drip irrigation is to see that this technology has a significant water-saving effect. It is reported that compared with traditional irrigation, drip irrigation can save 50-80% water, and the water consumption of one mu of flood irrigation can meet the demand of 2-4 mu of drip irrigation. Drip irrigation can effectively avoid the loss of water delivery process and deep leakage, and reduce the loss of ground evaporation and runoff. In the north, especially in the arid areas where there is no irrigation and no agriculture in the northwest, the significance of promoting drip irrigation is self-evident. 但是，水价低廉的现实淡化了基层的节水意识，加上管理不到位，该节约的水没有很好地节约下来，已建工程的滴灌节水率多数没有达到设计的节水效果，滴灌省水仅为50%左右，有的更低仅20-30%，其节水潜力值得挖掘。不少地方花大量资金建设滴灌工程项目，却没有看到预期的节水效果和成就，依然重复着水资源紧张的窘境。 However, the reality of low water price weakens the water-saving awareness of the grass-roots level. In addition, the management is not in place. Most of the water-saving rate of drip irrigation projects have not achieved the designed water-saving effect. The water-saving rate of drip irrigation is only about 50%, and some are only 20-30% lower. Its water-saving potential is worth exploring. Many places spend a lot of money to build drip irrigation projects, but they do not see the expected water-saving effect and achievements, and still repeat the dilemma of water resources shortage. |
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