نتایج جستجو برای: river bank erosion
تعداد نتایج: 173346 فیلتر نتایج به سال:
The Chinese Loess Plateau region has long been suffering from serious soil erosion. Thus, large-scale afforestation has continued during the past decades in order to control soil erosion. Afforestation can dramatically alter nutrient cycles, affect soil-carbon storage, and change hydrology. However, it is unknown how afforestation influences species diversity of the soil seed bank and understor...
River restoration can enhance river dynamics, environmental heterogeneity and biodiversity, but the underlying processes governing the dynamic changes need to be understood to ensure that restoration projects meet their goals, and adverse effects are prevented. In particular, we need to comprehend how hydromorphological variability quantitatively relates to ecosystem functioning and services, b...
Abstract: The Second Songhua River is the biggest river system in Jilin Province, China. In recent years, the rapid economic development in this area has increased the prominence of water resources and water-related environmental problems; these include surface water pollution and the overexploitation of groundwater resources. Bank infiltration on the floodplains of the Second Songhua River is ...
Bacteria are highly diverse and ubiquitous organisms that play a key role as drivers for ecosystem processes. The application of NGS (next-generation sequencing technologies) for 16S analysis has been broadly used for understanding bacterioplankton composition and structure. Most of studies conducted on aquatic ecosystems with 16S NGS have been in seawater and lakes. A few studies using NGS hav...
Climatic warming and permafrost thaw are predicted to increase Arctic riverbank erosion, threatening communities accelerating sediment, carbon nutrient cycling between rivers floodplains. Existing theory assumes that pore-ice sets erosion rates, but overpredicts observed rates by orders of magnitude. Here, we developed a simple model predicts more modest due sediment-entrainment limitation armo...
Streambank erosion is known to be a major source of sediment in streams and rivers. The Bank Stability and Toe Erosion Model (BSTEM) was developed in order to predict streambank retreat due to both fluvial erosion and geotechnical failure. However, few, if any, model evaluations using long-term streambank retreat data have been performed. The objectives of this research were to (1) monitor long...
High-resolution seismic data and sediment cores reveal the late Holocene subsurface stratigraphy of the broad Tappan Zee– Piermont region of the Hudson River Estuary. We identify a series of distinct, extensive horizons beneath the marginal flats, channel banks, and main channel in this area. Physical properties and lithology from sediment cores suggest that these horizons are surfaces of erosi...
Meander migration results from the interaction between inner bank accretion and outer erosion/collapse. This has been usually treated as a long-term average of sequence erosion events determined by flow hydrographs. Little attention paid to role that individual collapse play on meander evolution. To fill this gap, we developed numerical model river meandering describes explicitly collapse. Resu...
Abstract Riverbank erosion is one of the most hazardous disaster types for Bangladesh. It has both a direct and negative impact on people their livelihoods. This study aims to explore impacts Meghna riverbank coping strategies that have been adopted by affected combat this calamity, considering four unions under Matlab Uttar Chadpur District. The findings reveal occupational status, income expe...
Abstract. Arctic river systems erode permafrost in their banks and mobilize particulate organic carbon (OC). Meandering rivers can entrain OC from many meters below the depth of annual thaw, potentially enabling production greenhouse gases. However, amount fate that is mobilized by erosion uncertain. To constrain fluxes due to riverbank deposition, we collected floodplain sediment samples along...
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