查询词典 drainage district

Irrigation and drainage ; irrigation district ; water metering ; water metering instrument ; irrigation management

农田水利；灌区量水；量水装置；灌溉管理

Stalinization of soil is serious because of the Plain district irrigation drainage system is not complete, in addition backwards of irrigation methods and coarse-grained management methods.

平原灌区排水系统不完善，加之灌溉方法落后，管理粗放，土壤盐渍化比较严重。

This paper expounds the geology disasters of the strip mine,and investigation for the flood control and drainage management in the mine district and surrounding area,the city flood control plan and geology disaster control plan and executing,and compares their reason formed and rainfall inducement and watercourse transmission flood,and put forward the existing issues.

本论文对西露天矿地质灾害情况，矿区防、排水及矿区周边河道防汛安全情况进行了调查，同时考察了城市防洪预案和地质灾害预案的编制及执行情况。

Six are a wide range of applicability and flexibility, can be used in Daejeon, economic crops, vegetables and orchards; are seven gate opening set, from the beginning to the end of irrigation, without manual operation, greatly reducing labor irrigation to improve water working conditions; are eight gates to control irrigation systems and drainage Irrigation District, full-motion can also be used as pipe to replace the fields of agricultural,毛渠,斗渠to achieve from畦沟with water, can also be used as surge irrigation water distribution pipes at the end of class .

六是具有广泛的适用性与灵活性，可用于大田、经济作物、蔬菜和果园；七是闸板开度设定后，从开始到灌水结束，无需人工操作，极大地减少灌水用工，改善灌水的工作条件；八是闸管灌溉系统可与渠灌区、也可用作全移动管道输水，替代田间农、毛渠，完成从斗渠到畦沟配水，还可用作波涌灌溉的末级配水管道。

Thethesis compares the characters of ecosystem service in different district, main drainage basinand different segment in it, confirms the rules that the ecosystem service value is higher insouthern area than northern area and different characters along river and ridge. The ecosystemservice value is decreased regularly with the increasing of population density and elevationby compared analysis. The results of the ecosystem service values in 1981 and 2001 shows arule that ecosystem service value is steady for whole researched region and fluctuate in localarea in LRGR.

本文对比了各行政区、主要流域以及流域内部不同区段的生态系统服务功能特点，确定纵向岭谷区生态系统服务功能价值存在着南高北低的空间分布规律，且在河流、山脊处有着不同的变化特点；通过分析不同人口密度和海拔梯度下生态系统服务功能的价值，得出生态系统服务功能价值有随人口密度和海拔升高而下降的规律；通过对比81年与2001年生态系统服务功能价值的变化，阐述了纵向岭谷区生态系统服务功能价值总体稳定、局部变化的规律。

On the basis of figure of present land use from the year 1987 to 2003 and relief map with a ratio of one to ten thousand of a small drainage area of Luju district in Jiangchuan county,with the support of MapGis6.6 workstation,kinds of data including properties data and graph data were analyzed,a spatial information base was created,then correlative data on present land use and soll and water loss were extracted; kinds of databases were created finally.

中文摘要：以江川县路居片区小流域1987-2003年土地利用现状图和万分之一地形图为基础，在地理信息系统软件MapGis6.6工作平台支持下。处理各种属性数据、图形数据等信息。

It is also known as one of the most poisonous naturally occurring substances.

它也被称为一个最自然发生的有毒物质。

The greatest stress is found at the location on the cross section where V is the largest.

最大应力出现在横截面上V为最大的地方。