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- ecological water depth 生态需水量
- Effects of ecological factor such as water depth and light on turion germination of Potamogeton crispus L. had been studied much. 通过萌发实验探讨了菹草石芽重量和贮藏温度对石芽萌发及幼苗生长的影响。
- The hydrologist figured the water depth along a wharf piling. 水文工作者在码头桩上用数字标明水深。
- A weight on the end of a line, used to determine water depth. 铅锤系在一条线末端的重物，用来测定水的深度
- Prepare spud plate and wire-line to check water depth. 准备测探板和钢丝绳测量水深。
- The optimum aperture of an aerator is smallest at the water depth of 4 m. 一般水深在4 m左右;曝气器的最优孔径最小.
- The optimum water depth increases as the aperture of the aerator increases. 水深较小时,宜选用孔径较小的曝气器;
- Such as population de ity, street layouts, number of enterprises, water depth. 比如，人口密度，街道状况，企事业数量，水的深度。
- Such as population density,street layouts,number of enterprises, water depth. 比如，人口密度、街道状况、企业数目、水深。
- Constant minimum water depth: 21feet at mean low tide at the face of all docks. 稳定的最小的水深：21英尺在最低潮可面对所有的码头。
- Study on Theory and Method of Ecological Water Demand in the Lower Reaches of Heihe River. 黑河流域下游生态需水理论与方法研究。
- The corresponding problems of ecological water requirement for vegetation construction in semi-arid grasslands are studied from microcosmic angle. 摘要重点从微观角度研究半干旱草原区植被建设生态需水相关问题。
- On the premise of protecting river hydrobiology habitat,ecological water demand in mountainous rivers was studied. 主要从保护河流水生生物栖息地出发,探讨山区河流生态需水量问题。
- The Ankang Prefecture was taken as example to calculate ecological water requirement. 本文以安康地区为例,计算现状年生态需水量为61。
- An integrated classification system for ecological water demand is suggested according to different criterions. 建立了不同标准下的生态需水分类体系；
- After that,take Yanan city for example to calculate two kinds of ecological water requirement in the year of 2000. 以西北黄土高原地区延安市为例,分别计算了2000年来水条件下的河道内及河道外生态需水。
- The calculation of ecological water consumption is the basis of redistributing water resources. 摘要生态需水量的计算是水资源优化配置的前提和基础。
- Phragmite australis is a kind of helophyte,the submergence and the ground water depth have effect on the growth. 芦苇是一种喜水性植物，地表淹水程度和地下水埋深对芦苇生长都有明显的影响。
- The minimum instream ecological water demand is the epiboly value of each instream flow quantity. 河道内各项需水量的外包值为河道内的最小生态环境需水量。
- The seasonal range of temperature in the ocean is affected by factors such as latitude, water depth and distance to the shore. 海水的季节温度受纬度、水深和离岸远近等因素的影响。
