نتایج جستجو برای: lateral erosion of river
تعداد نتایج: 21186963 فیلتر نتایج به سال:
A key component of a sediment yield prediction is an estimate of the sediment deposition between erosion sources and a drainage basin outlet. This technical note presents methods requiring a minimum of data which can be used to assess the importance of sediment deposition within the river system of a basin. The methods were applied to a 4123 km basin in the Philippines. Results indicated that s...
This study challenges the paradigm that salt marsh plants prevent lateral wave-induced erosion along wetland edges by binding soil with live roots and clarifies the role of vegetation in protecting the coast. In both laboratory flume studies and controlled field experiments, we show that common salt marsh plants do not significantly mitigate the total amount of erosion along a wetland edge. We ...
River and the middle reaches of the Yellow River Z.C. Zhou*, Z.T. Gan, Z.P. Shangguan and Z.B Dong Department of Tourism and Environmental Sciences, Shaanxi Normal University, Xi’an, China; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences, Yangling, China; Key Laboratory of Disaster Survey and Me...
BACKGROUND AND PURPOSE There is a wide range of normal variation is sphenoid sinus development, especially in the size of the lateral recesses. The purpose of this study was to determine imaging characteristics that may help differentiate between opacification of a developmentally asymmetric lateral recess and a true expansile lesion of the sphenoid sinus. METHODS Coronal CT was performed in ...
Although sediment is a natural constituent of rivers, excess loading to rivers and streams is a leading cause of impairment and biodiversity loss. Remedial actions require identification of the sources and mechanisms of sediment supply. This task is complicated by the scale and complexity of large watersheds as well as changes in climate and land use that alter the drivers of sediment supply. P...
Soil erosion is one of the most critical environmental hazards in the world. Understanding the changes in rainfall erosivity (RE) and erosivity density (ED), as well as their affecting factors, at local and catchment scales in the context of climate warming is an important prerequisite of soil erosion prevention and soil loss risk assessment. The present study identified the variability and tre...
redescription of annina mesopotamica ahmed, 1971 (crustacea, cirolanidae, isopoda) from basrah, iraq
annina mesopotamica (ahmed, 1971), from iraq (shat-al-arab river bank, basrah) is redescribed. a. mesopotamica can be distinguished from other species of the genus in having a pair of short and blunt dorso-lateral horns on the male pereonite 2. a revised generic diagnosis is provided for the genus annina.
As international concern for the survival of deltas grows, the Mekong River delta, the world's third largest delta, densely populated, considered as Southeast Asia's most important food basket, and rich in biodiversity at the world scale, is also increasingly affected by human activities and exposed to subsidence and coastal erosion. Several dams have been constructed upstream of the delta and ...
Riverbank erosion is a major concern in all parts of the world due to its extensive impacts geomorphologically and economically. This study aims quantify rates riverbank Pusu River using pins method. Two sections river were selected namely site A B where straight section while situated on outside bend. 21 installed at each grid pattern. Measurement exposure taken from February 2019 April 2019. ...
[1] Soil erosion is a key socio-economic and environmental problem in Kenya, which has been poorly documented due to the lack of long, continuous records. Here we present Ba/Ca records from Porites corals from the Malindi coral reef documenting the flux of suspended sediment from the Sabaki River with a sub-weekly resolution for the last 300 years. While sediment flux from the Sabaki River is a...
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