Strategies for protection and sustainable environmental management of the High Aswan Dam reservoir in Egypt considering climate change
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(Sprache: Englisch)
Egypt is vulnerable to climate change, especially with regard to its water and land resources. Climate change will increase the evaporation losses from the High Aswan Dam Reservoir (HADR) and lead to loss of land at the northern coast due to sea level rise....
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Egypt is vulnerable to climate change, especially with regard to its water and land resources. Climate change will increase the evaporation losses from the High Aswan Dam Reservoir (HADR) and lead to loss of land at the northern coast due to sea level rise. In order to tackle this problem, this book assesses several adaptation tools that could be used to mitigate some of these impacts. For instance, Egypt could optimize ist water resources by decreasing evaporation losses from the HADR, or it could maximize land resources by identifying new settlement sites especially for climate migrants from the northern coastal zones. Databases on the characteristics of the HADR such as meteorological, hydrological, topographic and bed soil sedimentary data were compiled. Based on these databases, up-to-date mathematical models were developed to describe the hydrological characteristics of the HADR. Several options for reducing evaporation losses and new settlement areas were discovered and evaluated. Essential measures to preserve these areas were presented to promote sustainable development in this region.
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Textprobe:Chapter 3.4.3, Geology of the HADR area:
Figure 3.39 shows the basic geological map of the HADR area (Said, 1993). The major exposed rock units around the reservoir are Nubia Sandstones. Sand sheets and sand dunes are also relevant for the area. The Sinn El Kaddab carbonate plateau lies at the western side of the HADR. Granites and metamorphic hills are found on the reservoir's eastern side. The Nubia Sandstone plateau in the north eastern side of the reservoir displays an average elevation of 450 m AMSL, while on the other, western side of this water body, isolated hills of Nubia Sandstone are scattered over a wide area with an average altitude of 370 m AMSL. The sediments around Kalabsha Khor consist of fluvial deposits with cross bedded sand stone and have an average altitude of 250 m AMSL. The granite and meta-volcanic hills, in the northern part of the eastern side of the reservoir, have elevations ranging from 390 m to 590 m AMSL with eroded steep slopes. Oligocene basalt extrusions in the area are found in a North West direction around Abu Simbel and Toshka, in structurally controlled tectonically disturbed zones, within Cretaceous Nubia Sandstone exposures. Sand dune encroachments into the reservoir are frequently distributed over major sectors along the northern reservoir boundaries (Said, 1993).
From a geomorphologic point of view, the area around Aswan is almost flat, with a topography varying from 150-350 m AMSL. It is dominated by faults and the presence of several alkali granites and a syenite ring complex. Tectonic features, dominated by East West and North South fault systems, as well as a regional uplift characterize the northern part of the HADR. Geological data of these features indicate that a right-lateral strike-slip movement is the dominant mechanism along the Kalabsha Fault zone. Igneous intrusions and associated contact metamorphism may be found in a few localities on the western side of the HADR (Khalil et al., 2011).
From a
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hydrogeological point of view, the Nubian formation in the area consists of three horizontal units of total maximum thickness of 400 m. The lowermost unit, overlying the granitic basement, is an aquifer of fluvial sandstones and has a large-scale (several kilometers) horizontal permeability of 0.32 - 0.43 mim2. The middle unit is an Aquiclude unit (A hydrogeologic unit which, although porous and capable of storing water) that extends unbroken under the lake and leaks at times for several years. The uppermost unit is the phreatic aquifer, which is composed of 25% - 30% of porosity sandstones, interspersed with clay stone lenses, and has a large-scale permeability of 1.0 - 1.5 mim2 (Said, 1993).
3.4.4, Climate:
The HADR reservoir is situated in a desert area where the climate is extremely arid. The area is in the transition zone between the tropical climate with summer rain and the Mediterranean climate with winter rain (Springuel, 2005). Rainfall is extremely scarce during winter season, but sometimes occurs in very small amounts when the area is affected by active cold fronts of the Mediterranean depressions. Rainfall records during of the past 50 years, from 1961 to 2010, are grouped in six categories as listed in Table 3.11 (NWS, 2012, Nour El-Din, 2013).
The area around the HADR receives virtually no rainfall, except for occasional thunder storms in the winter, roughly once every ten years. The relative humidity is highest (40 - 41%) in December and January and lowest in May and June (13% - 15%). The wind speed does not vary greatly throughout the year, as the mean ranges from approximately 15 to 19 km/h. Ist direction is mostly NW-NE. Evaporation is very high, approximately 3000 mm/year (NWS, 2012, Nour El-Din, 2013).
There are six floating meteorological stations on the lake and one on the bank. One of the stations is a telemetric station in Abu-Simbel city (280 km upstream HAD), referred to as Toshka Station, and the others are over water (floating) meteor
3.4.4, Climate:
The HADR reservoir is situated in a desert area where the climate is extremely arid. The area is in the transition zone between the tropical climate with summer rain and the Mediterranean climate with winter rain (Springuel, 2005). Rainfall is extremely scarce during winter season, but sometimes occurs in very small amounts when the area is affected by active cold fronts of the Mediterranean depressions. Rainfall records during of the past 50 years, from 1961 to 2010, are grouped in six categories as listed in Table 3.11 (NWS, 2012, Nour El-Din, 2013).
The area around the HADR receives virtually no rainfall, except for occasional thunder storms in the winter, roughly once every ten years. The relative humidity is highest (40 - 41%) in December and January and lowest in May and June (13% - 15%). The wind speed does not vary greatly throughout the year, as the mean ranges from approximately 15 to 19 km/h. Ist direction is mostly NW-NE. Evaporation is very high, approximately 3000 mm/year (NWS, 2012, Nour El-Din, 2013).
There are six floating meteorological stations on the lake and one on the bank. One of the stations is a telemetric station in Abu-Simbel city (280 km upstream HAD), referred to as Toshka Station, and the others are over water (floating) meteor
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Autoren-Porträt von Emad Elba
Emad El-Din Mohammad Elba, was born 1967 in Egypt. The author got his bachelor's degree in Civil Engineer from Ain Shams University in Egypt. He gained his research experience in the fields of water resources management, sustainable development, preservation and climate change from expert professors of Leuphana University Lueneburg, Germany, where he got both his master's and doctorate degrees. Since 1995, he has been working in Nile water sector at the Egyptian Ministry of Water Resources and Irrigation where he gained his practical experience from the Nile hydrology experts. He worked in the Nile Basin countries and participated in the hydrological studies of the Nile basin of Lake Victoria in Uganda and High Aswan Dam Reservoir (HADR) in Egypt and Sudan. While joining the HADR surveying mission, the author decided to study how to reduce the evaporation losses to optimize Egypt's water resources.
Bibliographische Angaben
- Autor: Emad Elba
- 2017, 408 Seiten, 175 Abbildungen, Maße: 15,5 x 22 cm, Kartoniert (TB), Englisch
- Verlag: disserta
- ISBN-10: 3959353545
- ISBN-13: 9783959353540
- Erscheinungsdatum: 30.09.2019
Sprache:
Englisch
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