Impacts of the Aswan High Dam After 50 Years

Monsef, Hesham Abd-El; Smith, Scot E.; Darwish, Kamal

doi:10.1007/s11269-015-0916-z

Cited by 38 publications

(12 citation statements)

References 7 publications

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“…The River Nile is the most important freshwater supply in Egypt for thousands of years; it provides renewable water supply such as drinking, irrigation, and canalization in the Nile Valley and the Delta Region (Goher et al 2014;Ghodeif et al 2016;Negm 2017). Lake Nasser was generated by the construction of the Aswan High Dam between January 1964and June 1968(Abd El-Monsef et al 2015El Gamal and Zaki 2017;Salih et al 2019). The area of the Lake is about 5000 km 2 (Farhat and Aly 2018).…”

Section: Introductionmentioning

confidence: 99%

Environmental assessment of physical-chemical features of Lake Nasser, Egypt

Rizk

Juzsakova

Creţescu

et al. 2020

Environ Sci Pollut Res

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Lake Nasser is one of the largest man-made lakes on earth. It has a vital importance to Egypt for several decades because of the safe water supply of the country. Therefore, the water quality of the Lake Nasser must be profoundly investigated, and physico-chemical parameter changes of the water of the Lake Nasser should be continuously monitored and assessed. This work describes the present state of the physico-chemical (nitrate-nitrogen, nitrite-nitrogen, orthophosphate, total phosphate content, dissolved oxygen content, chemical oxygen demand, and biological oxygen demand) water parameters of Lake Nasser in Egypt at nine measurement sites along the Lake Nasser. The algorithm was devised at the University of Pannonia, Hungary, for the evaluation of the water quality. The aquatic environmental indices determined alongside the Lake Nasser fall into the category of "good" water quality at seven sampling sites and exhibited "excellent" water quality at two sampling sites according to Egyptian Governmental Decree No. 92/2013. In light of the tremendous demand for safe and healthy water supply in Egypt and international requirements, the water quality assessment is a very important tool for providing reliable information on the water quality. The protocol for water quality assessment could significantly contribute to the provision of high-quality water supply in Egypt. In conclusion, it can be stated that the parameters under investigation in different regions of Lake Nasser fall within the permissible ranges and the water of the Lake has good quality for drinking, irrigation, and fish cultures according to Egyptian standards; however, according to European specifications, there are steps to be accomplished for future water quality improvement. Keywords Water quality assessment. Physico-chemical parameters. Aquatic environmental index. Lake Nasser. River Nile. Egypt Nomenclature AEA Aquatic environmental assessment AEI Aquatic environmental index APHA American Public Health Association BOD 5 Biochemical oxygen demand during decomposition occurring over a 5-day period Chl Chlorophyll-a content CLvi Limit value of water chemistry parameter i CMi Measured value of water chemistry parameter i COD cr Chemical oxygen demand DO Dissolved oxygen content EC Electrical conductivity GD Governmental Decree

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Section: Introductionmentioning

confidence: 99%

Environmental assessment of physical-chemical features of Lake Nasser, Egypt

Rizk

Juzsakova

Creţescu

et al. 2020

Environ Sci Pollut Res

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“…The Nile River is considered as the world's longest river, its total length of 6670 km with a catchment area of 3.2 million km 2 . The Nile Basin Countries are eleven countries.…”

Section: Introduction To the Nile Basinmentioning

confidence: 99%

Assessment of Groundwater Resources After Gerd in Egypt

Ghany¹,

Hassan²,

Saleh³

et al. 2020

International Journal of Civil Engineering and Technology (Ijciet)

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Groundwater is a valuable source in Egypt. However, it is expected to face many challenges in next few decades due to climate changes, rapid population increase and development in the upper Nile Basin countries. All of these factors are putting more stresses on this source. Groundwater sector in Egypt is expected to suffer of rapid declination in levels due to the reduction of water recharge in the renewable aquifers (Nile Valley and Delta aquifers). This decline is expected due to climate change (on the long term) and due to GERD reservoir filling and operation stages (on the short term), which will cut large volumes of water which used to reach to Egypt from August to October/November.Moreover, the availability of the water all the year time and turning the flow into controlled instead of natural flow will encourage for more uses of the water in Sudan, which means more shortage in water supply to Egypt. Such decline in surface water source will put more pressure on the renewable and non-renewable aquifers in Egypt. Other concerns, due to decline of surface water, are seawater intrusion and land salinization which will affect the groundwater quality and adversely affect the agricultural activities and production.

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“…A lack of ecological discharge causes the lower reaches to dry up, reduce the number of species, and deteriorate the ecological environment. For example, construction of the Aswan Dam on the Nile River in Africa accelerated coastal erosion and salinisation [4], and different discharge rates of the Glen Canyon Dam in the United States affected the spawning and hatching rate of rainbow trout [5].…”

Section: Introductionmentioning

confidence: 99%

The Ecological Water Demand of Schizothorax in Tibet Based on Habitat Area and Connectivity

Zhou

Deng

et al. 2019

IJERPH

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Water resource regulation is convenient for humans, but also changes river hydrology and affects aquatic ecosystems. This study combined a field investigation and two-dimensional hydrodynamic model (MIKE21) to simulate the hydrodynamic distribution from 1 March to 30 April of 2008–2013 and establish the HDI (habitat depth suitability index) and HVI (habitat velocity suitability index) based on static hydraulic conditions at typical points. Additionally, by using MIKE21 to simulate the hydraulic state in the study area under 20 flow conditions from 530–1060 m3/s, and combining these states with the HCI (habitat cover type suitability index), HDI, and HVI, we simulated the WUA (weighted usable area) and habitat connectivity under different runoff regulation scenarios to study the water requirements of Schizothorax during the spawning period in the Yanni wetland. The results showed the following: (1) the suitable cover type was cobble and rock substrate, with nearby sandy land; furthermore, the suitable water depth was 0.5–1.5 m, and the suitable velocity was 0.1–0.9 m/s. (2) Using the proximity index to analyse the connectivity of suitable habitats, the range of ecological discharge determined by the WUA and connectivity was 424–1060 m/s. (3) Habitat quality was divided into three levels to detail the flow demand further. When the flow was 424–530 m3/s or 848–1060 m3/s, the WUA and connectivity generally met the requirements under natural conditions. When the flow was 530–636 m3/s or 742–848 m3/s, the WUA and connectivity were in a good state. When the flow was 636–742 m3/s, the WUA and connectivity were in the best state. This study complements existing research on the suitability of Schizothorax habitat in Tibet, and introduces the connectivity index to enrich the method for calculating ecological water demand, providing a reference for resource regulation and the protection of aquatic organisms.

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Impacts of the Aswan High Dam After 50 Years

Cited by 38 publications

References 7 publications

Environmental assessment of physical-chemical features of Lake Nasser, Egypt

Environmental assessment of physical-chemical features of Lake Nasser, Egypt

Assessment of Groundwater Resources After Gerd in Egypt

The Ecological Water Demand of Schizothorax in Tibet Based on Habitat Area and Connectivity

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