الفهرس 
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Abstract
There is excessive exploitation of groundwater in West Delta area, which resulted in problems in declining ground water and poor and increasing salinity of groundwater, and therefore there is a plan to overcome these problems by connecting the surface water from the Rosetta Branch to this region by a buried pipeline network. This development will resolve the problem of excess groundwater exploitation, as it will make up for the shortage of the water in the west of the delta discharge and to provide more water for new lands. The West Delta Water Conservation and Irrigation Rehabilitation development is a major response to protect some major investments in West Delta area and to add more cultivated land to this region. The water requirements for this development are estimated by about 12 million cubic meters per day forming an annual demand of 4.2 billion cubic meters.This research represents an environmental study for this major development that should be conducted before the development operation. This study highlighted the impacts of the development on Rosetta Branch.
West delta suffers from shortage of water and needs water demands to provide more water for irrigation and agriculture needs.
There is a need for improving irrigation water availability to the new lands in the west of the Nile delta this will include areas irrigated with surface water as well as area currently depending entirely on ground water for irrigation
Study the location of pump station at Rosetta branch of three proposed sites, which based on the results of determining the best location for the establishment of a pump station to feed El-Rayah El Nasseri around 12 million cubic meters per day.Data of the three sites as follows:
• Alqam town site, which is located on the western side of the River Nile –Rosetta Branch at 103,700 km downstream the measure of El Roda and in front of 1030.700 km downstream Old Aswan Dam.
• Site south of the town Abu Khawy, which is located on the western side of the River Nile - Rosetta Branch at 110,000 km downstream the measure of El Roda and in front of 1030.700 km downstream Old Aswan Dam.
• Site north of the town Abu Khawy, which is located at 112,500 km downstream the measure of El Roda and in front of 1030.700 Km downstream Old Aswan Dam.
Ten water samples were collected, nine samples from each site of the three proposed site of the pump station, and one guidance sample from Delta Barrage. The Results of parameters analysis show that we can convey water safely for the use for irrigation in West Delta area, based on FAO. The average water quality index (AWQI), and SAR index were calculated. from these calculations, we can conclude that the best site for the pump station at Rosetta branch is south of the town Abu Khawy.
This research was focused on:-
1. Constructing a database for different environmental parameters for Rosetta Branch to be easy to get the output information about the environmental impacts of irrigation systems development in west delta area especially on Rosetta Branch. The data stored in the database, help the decision makers to get these information easily as forms or reports.
2. Developing a one dimensional model to compute the effect of passing the maximum water requirements for the branch, after project completion on the Rosetta branch water level. The Rosetta branch was divided into 41 sections, the distance between the two sections is about 5 km, the cross sectional areas were computed to estimate the water level at each section according to the discharge of the West Delta project.
3. Study the different proposed locations of the pump station at Rosetta Branch for the development of West Delta area to make the required analysis of the data with different scenarios. The first scenario show the effect of Rosetta branch input discharge of the current demand, and the West Delta project effect, from this scenario we can notice that in the months of high discharge the water quality in the location suggested of the pump station at Rosetta Branch exceed the standard limits, but better than the months of low discharge, the second scenario show the effect of Rosetta branch input discharge of the future demand, and the West Delta project effect, from this scenario we can notice that the water quality in the location suggested of the pump station at Rosetta Branch is better than the effect of the current demand, the third scenario show the effect of Rosetta branch input discharge of the average water release, and the West Delta project effect, from this scenario we can notice that the water quality in the location suggested of the pump station at Rosetta Branch exceed the standard limits more than in the effect of the future demand, the fourth scenario show the effect of the wetland treatment on Rahawy , and Sabal Drain with the future demand of the West Delta project. The removal rate for BOD is 57 % and 50% for NH4, so we can notice that by this scenario we can improve the water quality in the location suggested of the pump station at Rosetta Branch.