watering period中文什么意思
灌水期
灌水周期
例句与用法
- After " south to north water transfer ( e ) " project put in practice , the self - purification capability will be decreased in the yangte river , especially in lower water period , so the wastewater discharge of shanghai will have an influence on wetland environment in the yangtze river month
摘要南水北调东线工程实施后，长江枯水期对其污水自净能力将会有一定程度的降低，因此，目前上海市污水排放会对长江口湿地和河口生态环境的影响将发生微妙的变化。 - With the development of the electric power system , static - state reactive power compensators ca n ' t have met the requirements of the actual production and operation , and the trend to the fast and dynamic compensation for reactive power become greater and greater . since ertan hydroplant and 500kv transmission systems in sichuan power system have been operated , many power plants of load center are forced to halt during the high - water period , because the great deal of power is transmitted to far - distance load center . thus the load center loses voltage sustentation and the level of the system stabilization is debased greatly
四川电网的二滩水电站和500kv输变电系统投入运行后，由于二滩水电站的大量电力远距离输送至负荷中心，迫使负荷中心的火电机组在丰水期大量停机，使负荷中心失去电压支撑，大大降低了电网的电压稳定水平；同时，因为四川电网中的无功补偿装置全为静态无功补偿电容器(或电抗器) ，这些设备只能在系统正常运行状态下起到无功补偿和电压支撑的作用，而在电网出现事故时，不但不能起到电压支撑作用，反而会促使电网电压崩溃事故的发生。 - This paper systematically analyzes the environmental effect of the ebinur lake area dynamic change and its influence on the railway along the lake , and the research establishes water balance equation of the ebinur lake , chooses the two characteristic phases , 1991 1992 , 1998 1999 , for computing , and concludes that since 1990s , water storage whether in low water period or in high water period is less than that of 1960s , whose lake area was 800km2 , and this area basically can reach the target of optimal eco - environment benefit
本文系统地分析了艾比湖湖面动态变化的生态环境效应及其对沿湖铁路线的影响。并通过艾比湖水量平衡方程式的建立,选择1991 1992年(枯水时段) 、 1998 1999年(丰水时段)两个特征时段进行计算分析,得出20世纪90年代以来,不论是枯水时段储水量,还是丰水时段储水量,均小于20世纪60年代湖泊水面保持800km2所需水量,而此水面基本可以达到湖区生态环境效益最佳的目标。 - On time , its expression in annual is , total nitrogen is higher in high water period than low water period , but it varying in agriculture area much regularly , and variations in industrial area are not so regularly ; in interannual , varying law of total nitrogen is different with its location
在时间上，年内变化表现为，丰水期的总氮浓度高于枯水期，但农业区的总氮浓度变化较为规律，工业区的变化呈现出不规律的现象；在年际上，总氮在年际的变化规律随地点的不同而存在差异。 - After analyzing , the author got the basic character of tidal flat hydrodynamic : the time of flooding on bare flat and ebbing is basically the same and the time of flooding on pioneer zone of salt marsh is a little short ; the process curve of current speed on bare flat did not appear peak value on the beginning of flooding and at the end of ebbing but presented double peak , that is , it presented double peak in winter and spring and ebbing peak value disappeared in summer and autumn , salt marsh presented single peak character in a year and the process curve in tidal creek presented double peak ; all current direction on every spot presented gyration current and the current speed changed rapidly during the high water level without obvious slack water period
分析得到了潮滩水动力基本特征：光滩水位涨潮和落潮时间基本相等，而盐沼前缘带水位涨潮时间略短；光滩流速过程线在涨潮初和落潮末出现峰值，呈现“双峰型”特征，盐沼前缘带则冬、春季节呈现“双峰型” ，夏、秋季节落潮峰值消失，盐沼带四季呈现单峰特征，潮沟内过程线为“双峰型” ；各测点流向均呈现回转流特征，在高水位时流向迅速改变，不存在明显的憩流。
