The influence of flood frequency and duration on microcrustacean egg bank composition in dryland river floodplain sediments

2021 ◽  
Author(s):  
Nipa Chaki ◽  
Michael Reid ◽  
Daryl L. Nielsen
Keyword(s):  
Flood Frequency ◽  
Egg Bank ◽  
River Floodplain ◽  
Dryland River ◽  
Floodplain Sediments

Chemical and mineralogical composition of Amazon River floodplain sediments, Brazil

1993 ◽  
Vol 8 (4) ◽  
pp. 391-402 ◽  
Author(s):  
Luiz A. Martinelli ◽  
Reynaldo L. Victoria ◽  
Jose Luiz I. Dematte ◽  
J.E. Richey ◽  
A.H. Devol
Keyword(s):  
Mineralogical Composition ◽  
Amazon River ◽  
River Floodplain ◽  
Chemical And Mineralogical Composition ◽  
Floodplain Sediments

Mobilization of arsenic and iron from Red River floodplain sediments, Vietnam

2010 ◽  
Vol 74 (12) ◽  
pp. 3367-3381 ◽  
Author(s):  
Dieke Postma ◽  
Søren Jessen ◽  
Nguyen Thi Minh Hue ◽  
Mai Thanh Duc ◽  
Christian Bender Koch ◽  
...  
Keyword(s):  
Red River ◽  
River Floodplain ◽  
Floodplain Sediments

scholarly journals Redox hydrogeochemistry of organic rich floodplain exemplified by Ammer river

2019 ◽  
Vol 98 ◽  
pp. 09014
Author(s):  
Evgenii Kortunov ◽  
Chuanhe Lu ◽  
Richard Amos ◽  
Peter Grathwohl
Keyword(s):  
Organic Carbon ◽  
Reactive Transport ◽  
Large Scale ◽  
Transport Model ◽  
Water Quality Management ◽  
Nitrate Contamination ◽  
River Floodplain ◽  
Atmospheric Inputs ◽  
Sediment Layers ◽  
Floodplain Sediments

Diffusive groundwater pollution caused by agricultural and atmospheric inputs is a pressing issue in environmental management worldwide. Various researchers have studied nitrate contamination since the substantial increase of nitrogen fertilization in agriculture starting in the second half of the 20th century. This study addresses large scale reactive solute transport in typical landscapes and aquifers exemplified by geological analogues of southwestern Germany.. Fate of nitrate and other solutes (e.g. agricultural nitrate, ammonium, natural sulfate and dissolved organic carbon) was studied in a typical small river floodplain. Reactive transport model of Ammer river floodplain shows that agriculture nitrate is reduced rapidly in the Ammer floodplain sediments. However, there is a potential for geogenic production of ammonium in sediment layers high in organic carbon and peat, which might be a major source of nitrate in the drains. Part of the nitrate in drains and creeks in the Ammer valley thus could be of geogenic origin. Such findings are relevant for regional land and water quality management.

Improving Practice of Flood Shelter Implementation in Alluvial River Floodplain With Hydro-Morphological Analysis

2019 ◽  
Vol 2 (2) ◽  
pp. 35-50
Author(s):  
Shammi Haque ◽  
Debanjali Saha ◽  
M. Shahjahan Mondal
Keyword(s):  
Flow Velocity ◽  
Dynamic Simulation ◽  
Morphological Analysis ◽  
Interdisciplinary Approach ◽  
Water Velocity ◽  
Flood Frequency ◽  
Hydraulic Analysis ◽  
Design Flood ◽  
River Floodplain

Flood shelter is widely used as a flood-proofing measure in floodplain areas. However, the practice of flood shelter implementation lacks proper planning, design, and construction. This study was undertaken to identify such gaps and bridge them through a case study and pilot of selected shelters in Bangladesh. An interdisciplinary approach comprising both quantitative hydrologic-hydraulic analysis and qualitative participatory social appraisal was followed in the study. The findings revealed that design flood levels were under-estimated, macro-stability of shelter sites were not assessed, and water velocity was not considered in shelter implementation. Based on an assessment of macro-stability of the chars, flood frequency and flow velocity through hydro-dynamic simulation with the HEC-RAS model, two shelters were redesigned and promoted as model shelters which performed well in a subsequent flood. The approach followed in this study can be replicated for shelter implementation in any riverine char environment for better outcome.

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