检索结果-南通市图书馆

第九次河流泥沙国际学术大会

作者： Tarek Mohamed ABDEL-AZIZ nile Research Institute National Water Research Center EL-Qanater 13621 Egypt

＜正＞Around 3 million t of cargo is transported over the nile river between Alexandria, Cairo and Aswan yearly. This transport is expected to increase considerably when the planned container terminal projects and other infrastructure projects in the nile Delta are completed. Also, It is of great concern to the responsive authorities are the more than 290 nile Cruise ships （Floating hotels） with a total capacity of 26,673 passengers, operating between Luxor and Aswan. Therefore, the Egyptian government has declared a high priority to the improvement of safety of navigation on the nile river. The main condition is mat the transport companies have certainly about the depth of the river and the draft for the ships, independent of time of the year and for both day and night navigation. The reduction in fright costs, increased safety and certainly of water depth will cause positive effect and has been proven world-wide to increase the amount of traffic. There is currently no navigation infrastructure, no Hydrographic survey nor are there any bathymetric charts available. This research work describes the main steps that should be followed now and in the Future to achieve safe navigation in the nile river based on IHO （International Hydrographic Organization） standards for hydrographic survey. After executing these steps it will be impossible to construct any berths unless the main navigable channel is established and connected to other routes to facilitate berthing and departure of vessels.

关键词： Navigation nile river Hydrographic survey Bathymetric charts

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Spatial distribution of δ2H and δ18O values in the hydrologic cycle of the nile Basin

引用

Journal of Arid Land 2015年第2期7卷 133-145页

作者： Jeff B LANGMAN School of Science and Engineering American University in Cairo Department of Geological Sciences University of Idaho

Existing δ2H and δ18O values for precipitation and surface water in the nile Basin were used to analyze precipitation inputs and the influence of evaporation on the isotopic signal of the nile river and its tributaries. The goal of the data analysis was to better understand basin processes that influence seasonal streamflow for the source waters of the nile river, because climate and hydrologic models have continued to produce high uncertainty in the prediction of precipitation and streamflow in the nile Basin. An evaluation of differences in precipitation δ2H and δ18O values through linear regression and distribution analysis indicate variation by region and season in the isotopic signal of precipitation across the nile Basin. The White nile Basin receives precipitation with a more depleted isotopic signal compared to the Blue nile Basin. The hot temperatures of the Sahelian spring produce a greater evaporation signal in the precipitation isotope distribution compared to precipitation in the Sahara/Mediterranean region, which can be influenced by storms moving in from the Mediterranean Sea. The larger evaporative effect is reversed for the two regions in summer because of the cooling of the Sahel from inflow of Indian Ocean monsoon moisture that predominantly influences the climate of the Blue nile Basin. The regional precipitation isotopic signals convey to each region＇s streamflow, which is further modified by additional evaporation according to the local climate. Isotope ratios for White nile streamflow are significantly altered by evaporation in the Sudd, but this isotopic signal is minimized for streamflow in the nile river during the winter, spring and summer seasons because of the flow dominance of the Blue nile. During fall, the contribution from the White nile may exceed that of the Blue nile, and the heavier isotopic signal of the White nile becomes apparent. The variation in climatic conditions of the nile river Basin provides a means of identifying mech

关键词： nile river arid environment deuterium excess regional climate model uncertainty evaporation isotope effects

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect of Changing the Effluent Path of Omar-Bek Drain on the Damietta Branch Water Quality

引用

Journal of Water Resource and Protection 2016年第1期8卷 20-30页

作者： Mohamed K. Mostafa Robert W. Peters Department of Civil Construction and Environmental Engineering University of Alabama at Birmingham Birmingham USA

The Omar-Bek drain, which represents the main source of water pollution along the Damietta branch of the nile river, receives about 600,000 m3 (158,503,200 gallons) daily of untreated domestic, agricultural, and industrial wastes. The main purpose of this research consisted of investigating alternatives of managing water quality at the Damietta branch;a comparison was conducted between the current situation and two proposed scenarios. The first scenario involved changing the effluent path of the Omar-Bek drain to another drain is called “Main Western drain”. The second scenario centered around improving water quality at the Omar-Bek drain by constructing a WWTP with a design capacity of more than 150,000 m3/day (39,625,800 gallons) and by improving water quality at this drain by increasing the efficiency of WWTPs that discharged daily about 60,000 m3 (15,850,300 gallons) of partially treated wastewater to the drain. The current situation and the two proposed scenarios were simulated by using river pollutant (RP) modeling. It was concluded that the Omar-Bek drain has no significant effect on the Damietta branch water quality and that, instead of changing the path of the drain, improving the efficiency of the existing WWTPs discharging to the Omar-Bek drain and preventing the direct discharge of domestic wastewater to the drain will provide the most effective ways of increasing the water quality of the Damietta branch.

关键词： Omar-Bek Drain river Pollutant Modeling Damietta Branch nile river Egypt

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：