Effects Of Wetland Conversion To Farming On Water Quality And Sediment And Nutrient Retention In A Tropical Catchment
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Effects Of Wetland Conversion To Farming On Water Quality And Sediment And Nutrient Retention In A Tropical Catchment
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Author :
language : en
Publisher:
Release Date : 2019
Effects Of Wetland Conversion To Farming On Water Quality And Sediment And Nutrient Retention In A Tropical Catchment written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with categories.
Effects Of Wetland Conversion To Farming On Water Quality And Sediment And Nutrient Retention In A Tropical Catchment
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Author : Abias Uwimana
language : en
Publisher: CRC Press
Release Date : 2019-11-26
Effects Of Wetland Conversion To Farming On Water Quality And Sediment And Nutrient Retention In A Tropical Catchment written by Abias Uwimana and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-11-26 with Science categories.
The study used a combination of landscape-scale synoptic surveys (catchment, reaches) and mesocosm surveys (experimental plots) to assess the impacts of conversion of natural valley-bottom wetlands to farming land on the water quality and retention of sediment and nutrients. The results showed that temperature, pH, electrical conductivity and dissolved oxygen concentration decreased, and total suspended solids (TSS) increased with storm water increase. Nitrogen (TN) and phosphorus (TP) accumulated in the catchment during the dry season and washed into the water courses during the early stages of the higher flows, with subsequent lower concentrations at the end of the rains due to dilution. Large proportions of the annual loads of TSS, TP and TN (93%, 60% and 67%, respectively) were transported during rainfall events that occurred in 115 days. Fishponds acted as temporal traps of TSS, TN and TP at the early stages of farming, and were a source of and TN and TP at the end of the farming period, in contrast to rice farming that generated sediments and nutrients early in the farming period and trapped them at the end of the farming season. Wetlands mostly acted as sinks but sometimes as a source of sediment and nutrients.
The Mekong Delta Environmental Research Guidebook
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Author : Edward Park
language : en
Publisher: Elsevier
Release Date : 2024-11-14
The Mekong Delta Environmental Research Guidebook written by Edward Park and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-11-14 with Science categories.
The Mekong Delta Environmental Research Guidebook comprehensively covers the Mekong Delta and presents new evidence on unsolved environmental issues. Key experts from around the world offer suggestions for the implementation of more effective mitigation and adaptation measures, especially in the context of climate change and upstream hydropower dam development. This book will help guide students and scientists, both juniors and seniors in their journey of the Mekong Delta Environmental Research, by presenting them with all the necessary information and detailed case studies for a more in-depth understanding of each issue so they can make informed decisions. - Presents a multi-scale viewpoint about the Mekong Delta from a global, to regional and local scale so that readers will gain a more holistic understanding of the issue from the root cause to solutions - Includes case-studies as empirical evidence to help researchers implement more effective mitigation and adaptation measures - Offers the most updated knowledge on strategies in halting environmental pressures, i.e., halting sinking delta and salinity intrusion
Effects Of Wetland Conversion To Farming On Water Quality And Sediment And Nutrient Retention In A Tropical Catchment
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Author : Abias Uwimana
language : en
Publisher: CRC Press
Release Date : 2019-11-26
Effects Of Wetland Conversion To Farming On Water Quality And Sediment And Nutrient Retention In A Tropical Catchment written by Abias Uwimana and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-11-26 with Science categories.
The study used a combination of landscape-scale synoptic surveys (catchment, reaches) and mesocosm surveys (experimental plots) to assess the impacts of conversion of natural valley-bottom wetlands to farming land on the water quality and retention of sediment and nutrients. The results showed that temperature, pH, electrical conductivity and dissolved oxygen concentration decreased, and total suspended solids (TSS) increased with storm water increase. Nitrogen (TN) and phosphorus (TP) accumulated in the catchment during the dry season and washed into the water courses during the early stages of the higher flows, with subsequent lower concentrations at the end of the rains due to dilution. Large proportions of the annual loads of TSS, TP and TN (93%, 60% and 67%, respectively) were transported during rainfall events that occurred in 115 days. Fishponds acted as temporal traps of TSS, TN and TP at the early stages of farming, and were a source of and TN and TP at the end of the farming period, in contrast to rice farming that generated sediments and nutrients early in the farming period and trapped them at the end of the farming season. Wetlands mostly acted as sinks but sometimes as a source of sediment and nutrients.
Towards The Sustainable Use Of African Wetlands
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Author : John Pascal Simaika
language : en
Publisher: Frontiers Media SA
Release Date : 2021-05-14
Towards The Sustainable Use Of African Wetlands written by John Pascal Simaika and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-05-14 with Science categories.
Effects Of Land Conversion On Water And Nutrient Retention In Tropical Catchments
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Author : Peter W. Walpole
language : en
Publisher:
Release Date : 2003
Effects Of Land Conversion On Water And Nutrient Retention In Tropical Catchments written by Peter W. Walpole and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Geography categories.
Sediment And Nutrient Retention By Freshwater Wetlands
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Author : Carol Arlene Johnston
language : en
Publisher:
Release Date : 1991
Sediment And Nutrient Retention By Freshwater Wetlands written by Carol Arlene Johnston and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Plant litter categories.
Freshwater wetlands alter surface water quality in ways which benefit downstream use. This review summarizes the mechanisms of freshwater wetland interaction with sediment and nutrients that affect surface water quality. The mechanisms vary in magnitude and reversibility, and differ among wetland types. They include sedimentation, plant uptake, litter decomposition, retention in the soil, and microbial processes. Sedimentation is a relatively permanent retention mechanism whereby particulates and associated contaminants are physically deposited on the wetland soil surface. Plant uptake and litter decomposition provide short- to long-term retention of nutrients, depending on rates of leaching, translocation to and from storage structures, and the longevity of plant tissues. Plant litter can also provide a substrate for microbial processing of nutrients. Wetland soils sorb nutrients, and provide the environment for aerobic and anaerobic microorganisms that process nutrients. Wetland storage compartments, fluxes, and net retention rates are discussed for nitrogen and phosphorus.
The Effect Of Nutrient Fluxing Between Bottom Sediments And Overlying Water On The Nutrient Budget Of Wetland Detention Retention Areas
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Author : Donald Alvin Graetz
language : en
Publisher:
Release Date : 1982
The Effect Of Nutrient Fluxing Between Bottom Sediments And Overlying Water On The Nutrient Budget Of Wetland Detention Retention Areas written by Donald Alvin Graetz and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with Organic water pollutants categories.
Wetlands Agriculture And Poverty Reduction
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Author : McCartney, Matthew
language : en
Publisher: IWMI
Release Date : 2010
Wetlands Agriculture And Poverty Reduction written by McCartney, Matthew and has been published by IWMI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.
In many places, growing population, in conjunction with efforts to increase food security, is escalating pressure to expand agriculture within wetlands. The environmental impact of wetland agriculture can have profound social and economic repercussions for people dependent on ecosystem services other than those provided directly by agriculture. If wetlands are not used sustainably, the functions which support agriculture, as well as other food security and ecosystem services, are undermined. This report synthesizes findings from multidisciplinary studies conducted into sustainable wetland agriculture by IWMI and partners in Africa and Asia. It highlights the value of wetland agriculture for poverty reduction as well as the need for more systematic planning that takes into account trade-offs in the multiple services that wetlands provide.
An Approach To Mass Transport And Nutrient Retention In A Tropical Freshwater Wetland Receiving Secondary Effluent
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Author : M. Nalubega
language : en
Publisher:
Release Date : 1994
An Approach To Mass Transport And Nutrient Retention In A Tropical Freshwater Wetland Receiving Secondary Effluent written by M. Nalubega and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.