Topic
Wadi
About: Wadi is a research topic. Over the lifetime, 1556 publications have been published within this topic receiving 15138 citations. The topic is also known as: jawra.
Papers published on a yearly basis
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Papers
TL;DR: In this paper, morphometric analyses have been used to estimate the flash flood risk levels of sub-watersheds within the Wadi Feiran basin, and a detailed geomorphological map for the most hazardous sub-basins is presented.
Abstract: Flash floods are considered to be one of the worst weather-related natural disasters. They are dangerous because they are sudden and are highly unpredictable following brief spells of heavy rain. Several qualitative methods exist in the literature for the estimations of the risk level of flash flood hazard within a watershed. This paper presents the utilization of remote sensing data such as enhanced Thematic Mapper Plus (ETM+), Shuttle Radar Topography Mission (SRTM), coupled with geological, geomorphological, and field data in a GIS environment for the estimation of the flash flood risk along the Feiran–Katherine road, southern Sinai, Egypt. This road is a vital corridor for the tourists visiting here for religious purposes (St. Katherine monastery) and is subjected to frequent flash floods, causing heavy damage to man-made features. In this paper, morphometric analyses have been used to estimate the flash flood risk levels of sub-watersheds within the Wadi Feiran basin. First, drainage characteristics are captured by a set of parameters relevant to the flash flood risk. Further, comparison between the effectiveness of the sub-basins has been performed in order to understand the active ones. A detailed geomorphological map for the most hazardous sub-basins is presented. In addition, a map identifying sensitive sections is constructed for the Feiran–Katherine road. Finally, the most influenced factors for both flash flood hazard and critical sensitive zones have been discussed. The results of this study can initiate appropriate measures to mitigate the probable hazards in the area.
439 citations
TL;DR: In this paper, a series of fieldwork-based differential GPS (DGPS) measurements along several profiles across the West Nubian Palaeolake basin provides the first precise topographic data from this up to a 5330 km2 large palaeola feature.
228 citations
TL;DR: Field research into the climatic history and shifting of the East Saharan desert has furnished evidence that during Quaternary time the present extremely arid western part of Upper Nubia (northern Sudan) was temporarily linked to the Nile by way of a hitherto unknown 400 kilometer long tributary.
Abstract: Field research into the climatic history and shifting of the East Saharan desert has furnished evidence that during Quaternary time the present extremely arid western part of Upper Nubia (northern Sudan)was temporarily linked to the Nile by way of a hitherto unknown 400 kilometer long tributary. From about 9500 to 4500 years ago, lower Wadi Howar flowed through an environment characterized by numerous ground water outlets and freshwater lakes. Savanna fauna and cattle-herders occupied this region, which today receives at most 25 millimeters of rainfall per year. At that period the southern edge of the eastern Sahara was some 500 kilometers further north than today and ground water resources were recharged for the last time.
205 citations
TL;DR: In the case of the Rotliegendes redbeds of northwest Europe, the proved and probable reserves of gas in the North Sea, Netherlands, and western Germany are about 2,500 × 109 cu m (85 × 1012 cu ft).
Abstract: The Permian redbeds of northwest Europe, termed the "Rotliegendes," are continental clastic sediments laid down under desert and semidesert conditions. Recent drilling in the North Sea, Netherlands, and north Germany has shown that these beds are in a sedimentary basin up to 2,000 km long and 500 km wide. This basin is in the foreland of the Variscan mountains. (Hercynian orogeny) and is of part-orogenic origin and partly fault bounded. Volcanic rocks are present locally, especially in the east. The Rotliegendes strata attain a maximum thickness of approximately 1,500 m. A central shale and halite facies (Haselgebirge facies), corresponding to a salt lake, changes toward the southern basin margin first to anhydritic clay (Ten Boer member) and then to sandstone and conglom rate of the Slochteren member (wadi deposits and eolian sands). Paleowind directions were essentially from east to west. Deflation of the alluvial fans spreading northward from the Variscan mountains resulted in accumulation of up to 200 m of dune sands in the southern North Sea area. The dune sands form the reservoir rock for important accumulations of gas. At present, the proved and probable reserves of Rotliegendes gas in the North Sea, Netherlands, and western Germany are about 2,500 × 109 cu m (85 × 1012 cu ft). The interpretations of Rotliegendes facies are based on a study of modern deserts and their sediments (wadi sediments, dune sands, and the sediments of inland and coastal sabkhas).
189 citations
TL;DR: In this article, a hydrological model driven mainly by information on land cover distribution and soil properties was used to predict sites at risk from large peak flows associated with flash flooding in a wadi located in the Eastern Desert of Egypt.
164 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2026 | 1 |
| 2025 | 145 |
| 2024 | 330 |
| 2023 | 267 |
| 2022 | 442 |
| 2021 | 185 |