河道内生态需水量,ecological flow in river course
1)ecological flow in river course河道内生态需水量
1.The habitat simulation method of research on theecological flow in river course of Yalong mainstream;雅砻江干流河道内生态需水量生境模拟法研究
英文短句/例句
1.ECOLOGICAL WATER DEMAND IN RIVER CHANNELS OF WATER DIVISION PROJECT:CASE STUDY调水工程河道内生态需水量研究及实例分析
2.Study on Hydraulic Methods Calculating Instream Base Flow Requirement;水力学方法估算河道内基本生态需水量研究
3.Research on the Estimating Methods of Basic Eco-environmental Water Requirements in River Course;河道内基本生态环境需水量计算方法研究
4.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
5.The primary estimation of ecological water requirement of Weihe river in Guanzhong region,Shaanxi Province,China渭河(陕西段)河道生态需水量估算
6.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
7.Study on the Ecological Water Demand of Typical Wetlands and Songliao River in the Northeast of China;东北典型湿地及松辽流域河道内生态需水研究
8.Preliminary Study on Requirement Rate of Ecological Water Demand in Middle and Lower Reaches of Hanjiang River汉江中下游河道内生态需水满足率初探
9.Calculation of Ecological Water Requirement of Natural Vegetation in Shiyang River Basin石羊河流域天然植被生态需水量计算
10.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
11.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
12.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
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 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
15.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
16.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
17.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
18.Research on Eco-environmental Water Requirement of Hebei Wetland;河北省现有自然湿地生态环境需水量研究
相关短句/例句
ecological water requirement河道生态需水量
1.In view of the present ecological problems in the Dalinghe River Basin,this paper estimatedecological water requirement(including ecological base-flow,self-purification water and sediment transmission water) and ecological water supply from water resources regionalization.本文从大凌河流域存在的环境问题出发,分别估算了各水资源分区的河道生态需水量(包括生态基流量、自净需水和输沙需水)及各区的河道生态需水贡献量。
3)the instream base flow requirement河道内基本生态环境需水量
4)Eco-environmental water demand inside the river channels河道内生态环境需水
5)the lowest environmental river water demand河道最小生态需水量
6)IEF and IEW河道内生态需水与生态水位
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。
