#Rusl E Learn Registration With Immediate

Rusl runs towards a monster that is close, to attack it. She stares out the window, my gaze following hers. Uli looks around frantically. Uli, Fado and I stare at each other in utter shock and disbelief. 'RUN' I dash into the nearest house.

The protection of this dam against erosive processes is a pressing economic goal. Sidi Mhamed Benaouda dam located in the Oranian hill, with a water capacity of respectively 241 million m3 plays a crucial economic role in this region. In fact, 74 dams are currently in operation these structures are silting up at a rapid pace, generating an estimated annual loss of 45 million m3. Uli is absolutely terrifie.To meet the pressing water needs in Algeria, the state has put in place a strategy consisting of the creation of hydraulic infrastructure for the mobilization of surface water resources. 'RUSL NO PLEASE NO' Holy shit.

Rusl E Learn Registration With Immediate

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This makes it a serious problem on a global scale and particularly worrying in certain regions of the world. Accordingly, the land area damaged by soil erosion is estimated at 1100 million hectares of land worldwide resulting in the transportation of 2.0 to 2.5 x 10 10 Mg of soil to the oceans each year. It also affects the quality of surface water and/or groundwater , reducing the capacity of the dams and decreasing the soil fertility for agricultural activities. It is one of the main causes of soil degradation in the world leading to a significant threat to both human societies and the environment. Water erosion is a phenomenon that results from the degradation of the surface layers of the ground cover and the displacement of the constituent materials under the effect of the kinetic energy of the raindrops and the transport of soil particles from their original location.

At the same time, a network of research stations was set up, which, thirty years later, resulted in the formulation of the USLE Equation. This resulted in the establishment of a water and soil conservation service by the US government. This is the dark era of the вЂњdust bowlвЂќ phenomenon.

In Europe, estimates that 25 million hectares have been seriously affected by erosion.In the Maghreb, the water and soil potentials are seriously threatened and the phenomenon of water erosion is very widespread. In the United States, on cultivated land, soil losses were estimated between 5 and 12В t/ha/year. The results of soil loss vary from 1 to 200В t/ha/year (up to 700В t/ha/year) under crops specific to forest regions where slopes ranging from 30 to 60% and 0.5 to 40В t/ha/year under millet, sorghum, peanuts and cotton on long tropical ferruginous glacis of the Sudano-Sahelian regions whose slopes vary between 4 and 25%. Consequently, due to the relevance of this problem, several studies have been carried out on agricultural plots of about 100 square meters , on micro-watersheds of a few hectares , on large basins of thousands of square kilometers and over large areas (countries and/or regions of the world). In fact, due to the torrential nature of the rains, the high vulnerability of the land and the unfavorable human activities impact (deforestation, fires, overgrazing, poor agricultural behavior, chaotic town planning, etc.) more degradation will affect the agricultural landscape.

According to , Algeria is qualified in the category of the poorest African countries in terms of water potential. Below the theoretical scarcity threshold set by the World Bank, which is around 1000 m 3 per inhabitant/year). Therefore, Algeria is a country that witnesses an enormous deficit of water (i.e. Thus, 14 million hectares of land in the country are threatened by water erosion. Although soil erosion is characterized as a natural phenomenon, human activities such as agriculture can accelerate it further in Algeria. In Algeria, the annual volume of sediment deposited in the 74 dams is estimated at 65 million m 3.

The dam Sidi Mhamed Benaouda (also named dam Es-Saada) is threatened by the silting from its site. One of these dams is that of wadi Mina catchment with a filling capacity of 241 million m 3. The sector expected to build around 139 dams by 2030. To meet AlgeriaвЂ™s urgent water needs, the States has implemented a strategy consisting of creating 94 hydraulic dams for the mobilization of surface water resources distributed throughout the national territory.

According to , the marly sector located in the northern part constitutes the major source of sediments deposited in this dam.Thus, the problem of water erosion mobilizes the scientific community to find solutions likely to ensure soil conservation. The dam Sidi Mhamed Benaouda was built in 1978 with the downstream of this zone. During these last decades and in a preoccupation with a management fight by the Algerian State, the catchment area of the wadi Mina was retained within the framework of a pilot project of integrated installation and development. This volume is on average about 3.2 million m 3.

In Europe, deduced that when soil losses exceed a threshold of 5В t/ha/year on cultivated land, the latter becomes intolerable. According to , the results of the study of water erosion in the Tamil Nadu basin (India) indicate that the average soil losses in this region are of the order of 6В t/ha/year. Indeed, in Asia, found that the tolerance threshold for soil loss in the Kelara sub-watershed in India was less than 1.5В t/ha/year. It is linked to the productivity of the land and its uses. The tolerance level for soil loss varies from region to region of the world.

A soil loss of 12 to 15В t/ha/year, or about 1В mm of soil per year (surface stripping) is sufficient to exceed the rate of alteration of the rocks. Underlines that any loss of soil greater than 1В t/ha/year is considered irreversible over a period of 50 to 100В years. Also, in the Alaca basin in Turkey, estimated a water erosion tolerance rate of up to 12В t/ha/year. In northwestern Turkey, the results obtained in the Buyukcekmece region by , show that a soil loss rate is low for a value of less than 1В t/ha/year, while beyond 10В t/ha/year, the phenomenon of erosion becomes a serious problem. Almost 90% of its basins have average annual rates of less than 2В t/ha.