For water conservation reasons , the water supplies department s policy on using mains water in air - conditioning systems is that they should be of closed circuit cooling type where the operational losses are negligible 为了节约用水，水务署就空调系统使用由政府喉管供水所制定的政策，规定有关系统应以闭路冷却方式操作，把耗水量减至最小。
The results indicate that there is no significant difference with the turfgrass water consumption and change of amount , whether it is irrigated with sewage effluent or clean water 结果表明，污水灌溉条件下草坪草耗水量与清水灌溉条件下草坪草耗水量差异不显著；污水灌溉条件下草坪草耗水规律和清水灌溉条件下草坪草耗水规律呈相似的变化趋势。
Results show that the growth of plants is limited , growth of root is enhanced , water consumption is reduced , water use efficiency increase apparently , yield has little reduce when reducing irrigation water and detaining irrigation time properly 结果显示：分蘖拔节期适当减少灌水量并推迟灌水时间，能抑制春小麦地上部分的生长，促进根系生长，减少总耗水量，提高水分利用率。
In plain area , following the increase of water use coefficient , the amount of water withdrawal and consumption for agriculture is gradually decreased and at the same time the saved amount of water withdrawal and the saved amount of water consumption increase gradually , but the increase rate tends to small 随着水的利用系数的提高，农业取用水节水量和耗水量不断提高，且取用水节水量和耗水节水量的增加幅度越来越小。
Based on the data getting from field experiment in 2004 , the sas software is used to analyses the growth of plants and root , yield and its composition , water consumption and water use efficiency under different quantity of irrigation water and irrigation time in prophase 摘要依据2004年试验资料，采用sas统计分析软件，研究了在不同灌水量、灌水时间处理下，春小麦生长前期生长状况、干物质积累、最终产量及其组成、春小麦田的耗水量和水分利用率。
The results showed : fiber ball has the highest efficiency among the three , its water - consumption is small in backwash and it is more wear - resisting ; the comprehensive property of quartz grain filter material is poorer ; manganese grain has an effective removal of fe ( superscript 2 + ) and mn ( superscript 2 + ) but water - consnmption is big 结果表明纤维球滤料除铁滤速高，反冲洗耗水量小且耐磨损；石英砂滤料综合性能次之；锰砂虽然除铁效果较好，但反冲洗耗水量大。
The relation which is among photosynthetic of three kind lawnx dateable and yearly transpiration rule and environmental factor is found by analysis . it is gotten account water consumption of lawn in certain unite area and ecological water requirement by accounting . all the result provides basic - 2 - data for park and garden department in changchun and offer scientific and logical advice 将结果进行分析，得出三种草坪草光合、蒸腾的年、日变化规律及与外界环境因子的关系，通过计算求出草坪草单位面积的蒸腾耗水量，为长春市园林部门提供科研基础数据，对北方城市草坪的选种及水分管理提供合理化建议，期望以尽可能少的经济投入换取更大的生态效益。
As cleaning always involves only a small part of the filtration area , i . e . only a small number of filter candles are cleaned at any time , back - flushing is very fast and highly effective . filtration is not interrupted during the back - flushing process . the only moving parts are the back - flushing arm and the flow control device ; their plastic bushings re - adjust automatically and therefore wear and maintenance costs are extremely low 反冲洗耗水量少：本机反冲时同一时间只清洗一到两只滤芯，占整个滤芯数量的十几到二十几分之一，所以排污耗水量小于设计流量的5 % ，反冲洗可自动定时差压手动切换，可编程序控制器plc控制。
Distinct mankind ' s effect of the 60 ’ s , because of greatly opened up strategy implementation in the west in the near future , retreating the straw and limiting to pasture and usage of trickle irrigation , that each steps such as above and so on wholly shall benefit to the farming water amount to be saved , thereby add into the amount of flow in lake 不同于上世纪60年代的人类活动作用的影响,近期由于西部大开发战略的实施,退地还草、限制放牧、滴灌农业的推广等措施都将有利于流域农业耗水量降低,从而增加入湖径流量。这一阶段湖泊水面急剧增加是气候干湿变化的自然现象,与农业节水因素没有显著的关系。
