查询词典 watercourse

Types and essential requirements for watercourse cofferdam used in the project of "Gas from the West to the East" are introduced.

随着世界天然气工业的迅速发展，天然气贸易的频繁，对天然气的准确计量要求越来越高。

Recently , Ecological restoration is the pop discussion all along ,riparian vegetation can prevent slope by corrasion ,but others put forward that vegetation will recede the watercourse's capability of flood discharge .

近年来，生态修复一直是学者探讨的热门课题，河岸种植植被能固滩固岸，保护岸坡不受侵蚀，但也有专家提出植被会降低河道的泄洪能力。

Since 1980 the river net pattern began to show typical features of artificial river system with straight watercourse, low curvilinearity.

近百年来扬中的渠网系统发生了显著变化。1935年和1958年河港为近于自然树枝状水系。1980后河港格局表现出典型的人工水系特征，到1994年河港数量和长度明显增加，网络的结构趋于复杂，河港网络趋于完善，但城镇及其附近的渠道和池塘逐渐减少。

Based on the eco- environment function, confirmed the constitution of eco- environment water demand(including the inside of the watercourse.and the ecological water demand of the outside of the watercourse such as ecological water demand of economical crop, of lake or reservoir and of cities.).③Analyzing the physical geography, hydrography, economy characteristic and water resource status, getting the proper calculation method. The Tennant applied to the eco- environment water demand of inside of the watercourse, woodland minmum eco- environment water demand calculation method applied to the eco- environment water demand of woodland, water ration method applied to farmland the eco- environment water demand, water evaporation method applied to the reservoir eco- environment water demand.

本文以流域生态环境需水为主要研究对象，因此重点阐述了流域生态环境需水量的分类和计算方法；②通过分析流域生态系统构成与流域生态环境功能，并分时段和河段考虑，确定了桃花江流域生态环境需水量的组成，即包括维持现状河道生态环境功能现状的现状生态环境需水量与流域生态环境改善的生态环境需水量，前者包括河道内生态环境需水量(维持河道基本生态功能需水量、维持河道自净稀释功能需水量、补充地下水水量及美化流域景观娱乐需水)与河道外生态环境需水量(流域内植被、森林、农田的需水量和与河道相连的池塘、水库等的需水量)；后者还包括为治理改善流域生态环境而拟规划林业生态建设所需水量；③对桃花江流域的自然地理、水文地质和社会经济特征以及水资源现状及其主要生态环境问题进行了综合分析，提出了适合桃花江流域的生态环境需水量计算方法，即采用Tennant法计算河道内生态环境需水量，采用林地最小生态环境需水量法计算林地生态环境需水量，采用需水定额法计算农田生态环境需水量，采用水面蒸发法计算水库、池塘生态环境需水量。

Along with the extended construction of ecological watercourse, varies of hydrophyte are used to purify polluted water.

随着生态型河道的推广建设，各类水生植物被用于河道水体净化，然而植被的种植改变了原先河道的水体结构，影响了水体的水流特性。

A watercourse that feeds water into a mill, water wheel, or turbine.

引水渠道将水送入磨坊、水轮或涡轮机的''。'水道'。

Watercourse ; water surface profile ; regression model

河道；水面线；回归模型

NDWI and MNDWI can not distinguish the semidry watercourse from the noise in semi-arid regions.

利用NDWI和MNDWI提取半干旱地区水系，无法有效的区分水系内的半干涸河道与背景噪音。

With the purpose of managing water resource effectively, using Shanghai watercourse data, Shanghai watercourse information system based on GIS is established by component technology and the implementation methods of its function modules are discussed in this paper. Based on these, GIS integrated technology is applied in water resource administrative area, which is important to utilize water resource reasonably and also can improve its management efficiency.

为了对水资源进行有效管理，以现有上海市的河道数据为依据，运用组件技术创建了基于地理信息系统的上海市河道变化信息系统的设计及各个功能模块的实现方法，在此基础上，进行了GIS系统集成技术在水资源管理领域的应用研究，这对于合理利用水资源、提高水资源的管理效率具有重要的理论意义和实际应用价值。

The researcher points out the analytic methods and steps then uses the two-dimensional hydrodynamic model to analyze the simulation of watercourse. There are three two-dimensional hydrodynamic models (inclusive of the RMA2 model, HIVEL2D model and FESWMS model) which are included identical range and limitation in our graduate school. The researcher chose the two-dimensional hydrodynamic model as the proper tool which can be used to simulate the flowof the old street stream. Researcher will transvaluation the retaining ability of the watercourse and consider the practice requirements to make the proper govern suggestion, furthermore, the results can be used as the reference of relative principles.

本研究旨在提出分析方法与步骤，使用二维水理模式作一河道模拟分析，由於本研究所介绍三个二维水理模式（包含RMA2模式、HIVEL2D模式、FESWMS模式）均有其适用之范围以及限制之条件，故本研究选定一适合模拟老街溪之二维水理模式作为水理分析之工具，藉由分析之结果，重新评估该河段之防洪排洪能力，并就实际整体防洪需求做妥善的治理建议，使研究成果能提供相关对策之参考。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。