河流生态环境需水量,river eco-environment water demand
1)river eco-environment water demand河流生态环境需水量
1.Application of wetted perimeter method in determining critical point ofriver eco-environment water demand湿周法确定河流生态环境需水量临界点的应用
英文短句/例句
1.Research on eco-enviromental water requirement for main rivers in Haihe Basin海河流域控制性河流生态环境需水量研究
2.Study on Eco-environmental Water Requirement and Eco-environmental Early Warning of River System in TaiZhou;泰州市河流生态环境需水量及河流生态环境预警研究
3.Theory and Engineering Application on Water Demand for Ecological Environment of a River System;河流生态环境需水量的理论研究及运用
4.Application of wetted perimeter method in determining critical point of river eco-environment water demand湿周法确定河流生态环境需水量临界点的应用
5.Eco-environmental Water Demand about the Main Current of the Huifa River in River Course;辉发河干流河道生态环境需水量研究
6.Study on the Minimum Water Requirement of Eco-environment of the Yellow River Artery in Henan;黄河干流河南段最小生态环境需水量研究
7.Study on Ecological Water Requirement of Stream-Channel in the Plain Reach of Hai-River Basin;海河流域平原河道生态环境需水量计算
8.Research on Eco-environmental Water Demand in the Sanggan River in Shaanxi Province桑干河干流山西段生态环境需水量研究
9.Research on Eco-Environmental Water Requirement of Tarim Mainstream Watershed;塔里木河干流流域生态—环境需水研究
10.Study of Eco-environmental Water Requirement of Zhangxi Drainage Basin in Ningbo City;宁波市樟溪河流域生态环境需水研究
11.The Research about the Environmental Water Requirement of Small Watersheds Water and Electricity Exploitation;小流域水电开发生态环境需水量研究
12.Research on the Ecological and Environmental Water Requirements of the Highland and River Channel in the Yellow River Basin;黄河流域坡高地与河道生态环境需水规律研究
13.Research on Eco-environmental Water Requirement and Optimization on Water Quality Management of River Network in Southern Jiangsu Province;苏南河网生态环境需水量及水质管理优化研究
14.Study on Theory Method and Application of Ecological and Environmental Water Requirement of River;河流生态环境需水理论方法及应用研究
15.Study on Water Demand of Ecological Environment of Middle and Small River in High and Cold Area;高寒地区中、小河流生态环境需水问题的研究
16.Study on Eco-Environmental Water Demand and Assessment of Eco-Environmental Vulnerability in Minqin Oasis of the Lower Reach of Shiyang River;石羊河下游民勤绿洲生态环境需水量及生态环境脆弱性评价
17.Study of Eco-environmental Water Requirements Based on ANN and SVM for the Yellow River Estuary;基于ANN和SVM的黄河口生态环境需水量研究
18.Research on Eco-environmental Water Demand of Lake Wetlands in Lixiahe District;里下河地区湖荡湿地生态环境需水量研究
相关短句/例句
river ecological water demand河流生态需水量
3)ecological and environmental water requirement生态环境需水量
1.Ecological and environmental water requirement in the middle Yellow River黄河中游河道生态环境需水量研究
2.The current research status ofecological and environmental water requirement was summarized.对国内外生态环境需水量研究现状作了概述。
3.Because theecological and environmental water requirement for river channel is calculated individually in every division, the repeated amount betweenecological and environmental water requirements of river channel existed in neighboring reaches.为真实反映流域各区间的河道生态环境需水量差异 ,同时解决流域上下游河道生态环境需水量的重复计算问题 ,提出了河道生态环境分区需水量的概念 ,对流域分区、河道功能确定和河道生态环境分区需水量计算方法进行了研究 。
4)eco-environmental water requirement生态环境需水量
1.Study on theeco-environmental water requirement for wetland in Yellow River basin;黄河流域典型湿地生态环境需水量研究
2.The study oneco-environmental water requirement of nansihu lake;南四湖湿地生态环境需水量研究
3.Theeco-environmental water requirement of Daminghu Lake was calculated in with the functional method.采用湖泊生态环境需水量功能计算法,对济南市的城市湖泊大明湖,从湖泊蒸发需水量、沿湖绿地需水量、生物栖息地需水量、湖泊净化需水量、湖泊渗漏需水量、景观与娱乐需水量和公园内设施用水7个方面,初步计算了在气候条件下的大明湖生态环境需水量,计算中考虑了生态优先原则、兼容性原则和水质为重点原则,计算结果为:湖泊蒸发需水量为1。
5)water demand of ecological environment生态环境需水量
1.Using the modified Tennant method worked onwater demand of ecological environment for middle and small river in high and cold area;田纳特法在确定寒区中、小河流生态环境需水量中的修正
2.Review of calculation method forwater demand of ecological environment;生态环境需水量计算方法研究现状
3.It is used to calculate thewater demand of ecological environment.本文介绍了标准流量法计算河流生态环境需水量的状况,针对四川省情况结合四川省水文资料,用当前广泛应用的各种标准流量法,对四川省河流生态环境需水量进行统计计算分析。
6)eco-environmental water demand生态环境需水量
1.Discussion oneco-environmental water demand in Weihe River Basin of Shaanxi Province;陕西省渭河流域生态环境需水量探讨
2.The method of allocation ofeco-environmental water demand in water resources planning;生态环境需水量在水资源规划中的配置方法
position ofeco-environmental water demand of plain river network in Taihu Lake Basin and its calculation method;太湖平原河网系统生态环境需水量组成及计算方法研究
延伸阅读
植物需水量植物全生育期内总吸水量与净余总干物重（扣除呼吸作用的消耗等）的比率。由于植物所吸收的水分绝大部分用于蒸腾，所以需水量也可认为是总蒸腾量与总干物重的比率。如用每形成 1克干物质需要蒸腾水分的克数表示，则称蒸腾系数。如稻的蒸腾系数为680,小麦为540，玉米为370（见表）。系数愈大则水分利用效率愈低。蒸腾系数的倒数，即植物每蒸腾失水1000克所形成干物质的克数称蒸腾效率，其值越大则水分利用效率越高。一般植物的蒸腾效率为1～8。各种作物的水分利用效率不同。一般四碳植物的需水量低于三碳植物。这与两者的地理起源不同，形态、结构、生理、生化特性以及由此所决定的光合效率不同有关(见光合作用)。四碳植物由于有较高的光合固碳效率,一般气孔频率低于三碳植物，因而增大了气孔对水分的阻力，减少了蒸腾失水，提高了水分利用效率。同一种作物的需水量,还常因其他条件变化而异,如在土壤缺乏氮、磷、钾等无机营养时，水分利用效率降低，需水量增加。参与水分代谢的水分称生理需水。由于土面或棵间蒸发以及因径流与渗漏等而需要消耗的一定量水分，则并不被吸入植物体内参与水分代谢，只具有调节生态环境中水平衡的作用，因而可称为生态需水。灌溉时计算的作物需水量实际上是生理需水与生态需水的总量。作物需水量的测定，对计算农业用水、灌溉定额以及选择适合干旱地区栽培的作物类型等都具有重要意义。
