Download or read book Carbon Dynamics on Floodplains of the Yangtze and Mekong Rivers written by Benjamin L. Miller and published by . This book was released on 2020 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: The lateral expansion and contraction of rivers across their floodplains inextricably links aquatic and terrestrial ecosystem processes for part of each year, yet our understanding of the ecological responses to this seasonal hydrologic forcing is distinctly incomplete. The Flood Pulse Concept (FPC) predicts how in-situ primary production and respiration respond to this forcing. Although many of its predictions remain untested, the FPC is highly-cited and continues to guide hypotheses of ecosystem studies in tropical and subtropical flood-pulse rivers. In Chapter 1 of this dissertation, I reviewed the literature published from 1989 to 2019 on tropical rivers to provide an updated narrative of how primary production and respiration change in response to the seasonal flood-pulse. The literature shows that the in-situ respiration of a combination of aquatic and terrestrial organic carbon (C) exceeds primary production in tropical and subtropical flood-pulse rivers (i.e.,ecosystems are net heterotrophic). For the remainder of the dissertation, I propose that this net heterotrophy changes in response to flood-pulse hydrology and is sustained by both aerobic and anaerobic metabolism, contributing to the composition of dissolved C gases in water, atmospheric emissions of C gases, and the energetic base of aquatic food webs. I further propose that such cycling of C in flood-pulse rivers is fundamentally changed by hydropower development, which alters the magnitude and timing of the seasonal flood-pulse. A central theme that has emerged from the dissertation research presented here is the importance of anaerobic metabolism, specifically CH4 production and oxidation, within inland waters. Anaerobic metabolism has been largely ignored in studies of aquatic C cycling and ecosystem metabolism, with implications for C accounting in other flood-pulse and anaerobic ecosystems, worldwide. Collectively, this work demonstrates that CH4 production and oxidation contribute significantly to CO2 oversaturation, atmospheric C fluxes, and aquatic biota, challenging existing assumptions about terrestrial-aquatic transfers, net heterotrophy, and food web support within flood-pulse rivers and lakes.
Download or read book Integrated Management of Environmental Factors Contributing to Impacts of the Yangtze River Flood Events written by and published by . This book was released on 2000 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evolution and Water Resources Utilization of the Yangtze River written by Jin Chen and published by Springer. This book was released on 2019-06-07 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive overview of the Yangtze River system and its water resources development and management. From the perspectives of geology, hydrology, zoology, ecology, it discusses the Yangtze River’s geological history and aquatic environments, analyses the endangered species along the river basin, and reviews the effects of human hydrolytic activities on its ecosystem. By studying the history of Yangtze River system and its water resources development, it provides insights into the effects of evolution and human activities on the ecosystem of its basin, and offers strategic thoughts on conservation and sustainable development of the Yangtze River. Written by an author with extensive experience in the field, this book is an invaluable reference resource for researchers interested in the Yangtze River.
Download or read book Beautiful Floods written by Judith Ehlert and published by LIT Verlag Münster. This book was released on 2012 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Floods are generally perceived as natural hazards. This book, in contrast, portrays the 'beautiful floods' of the Mekong Delta, which annually constitute a substantial resource for people's rural livelihoods. With a focus on floods, the book employs a 'lifeworlds' analysis to investigate dynamics of environmental and livelihood knowledge among farming and fishing communities, and it demonstrates that rapid agrarian change has both positive and negative impacts. (Series: ZEF Development Studies - Vol. 19)
Download or read book The Nature of Disaster in China written by Chris Courtney and published by Cambridge University Press. This book was released on 2018-02-15 with total page 313 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1931, China suffered a catastrophic flood that claimed millions of lives. This was neither a natural nor human-made disaster. Rather, it was created by an interaction between the environment and society. Regular inundation had long been an integral feature of the ecology and culture of the middle Yangzi, yet by the modern era floods had become humanitarian catastrophes. Courtney describes how the ecological and economic effects of the 1931 flood pulse caused widespread famine and epidemics. He takes readers into the inundated streets of Wuhan, describing the terrifying and disorientating sensory environment. He explains why locals believed that an angry Dragon King was causing the flood, and explores how Japanese invasion and war with the Communists inhibited both official relief efforts and refugee coping strategies. This innovative study offers the first in-depth analysis of the 1931 flood, and charts the evolution of one of China's most persistent environmental problems.
Download or read book Analysis of Flood Hazards in the Yangtze River Valley and Strategies for Sustainable Flood Risk Management written by Tong Jiang and published by . This book was released on 2000 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of Flood Hazards in the Yangtze River Valley and Strategies for Sustainable Flood Risk Management written by Jiang Tong and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book River at Risk written by Milton E. Osborne and published by New Society Publishers. This book was released on 2004 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Paper delves into the conflict in the Mekong between countries' desire for hydroelectric power to satisfy soaring demand and the Mekong's fragile ecosystem and role as a primary food source. Over 70 million people depend directly on the river for their livelihood. Effective regional governance of the Mekong is needed but is not forthcoming.
Download or read book Flooding and Carbon Dynamics on the Lower Amazon Floodplain written by Conrado de Moraes Rudorff and published by . This book was released on 2013 with total page 203 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gas transfer coefficients that take into account both wind and heat fluxes at the lake's surface were approximately four times higher than values previously used in regional estimates of gas evasion from lakes on the Amazon floodplain.
Download or read book Analysis of Flood Hazards in the Yangtze River Valley and Strategies for Sustainable Flood Risk Management written by Jiang Tong and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flood Risks and Land Use Conflicts in the Yangtze Catchment China and at the Rhine River Germany written by Lorenz King and published by Peter Lang Pub Incorporated. This book was released on 2001 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent decades a dramatic increase in the frequency and intensity of floods has been observed. Of all natural hazards encountered in the world, floods are among the most frequent and costliest in terms of economic losses, and they cause the largest number of deaths. This publication is the result of a bilateral German-Chinese symposium and deals with flood related issues along the Rhine and the Yangtze, the most important rivers in Germany and China. The book covers a wide range of specific as well as broader topics such as vulnerability, flood risk management and mitigation, land use, sustainable development, and watershed ecology. This book will serve as a valuable reference for hydrologists, geographers, regional planners, politicians, engineers, scholars or any other person interested in the field of flood management.
Download or read book Large scale Floodplain Sediment Dynamics in the Mekong Delta written by and published by . This book was released on 2014 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Mekong Delta (MD) sustains the livelihood and food security of millions of people in Vietnam and Cambodia. It is known as the "rice bowl" of South East Asia and has one of the world's most productive fisheries. Sediment dynamics play a major role for the high productivity of agriculture and fishery in the delta. However, the MD is threatened by climate change, sea level rise and unsustainable development activities in the Mekong Basin. But despite its importance and the expected threats, the understanding of the present and future sediment dynamics in the MD is very limited. This is a consequence of its large extent, the intricate system of rivers, channels and floodplains and the scarcity of observations. Thus this thesis aimed at (1) the quantification of suspended sediment dynamics and associated sediment-nutrient deposition in floodplains of the MD, and (2) assessed the impacts of likely future boundary changes on the sediment dynamics in the MD. The applied methodology combines field experiments and numerical simulation to qu
Download or read book Flood Prevention and Drought Relief in Mekong River Basin written by Hui Liu and published by Springer. This book was released on 2020-07-21 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an overview of flood and drought in the Lower Mekong Basin, reviews the characteristics of flood and drought, and details structural and non-structural measures for flood and drought mitigation employed in the basin countries, as well as their flood and drought mitigation capacity. Given its scope, the book offers a valuable resource for researchers and engineers in the field of transboundary rivers, especially those with an interest in the Lower Mekong River.
Download or read book Biogeochemical Dynamics at Major River Coastal Interfaces written by Thomas Bianchi and published by Cambridge University Press. This book was released on 2014 with total page 673 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive, state-of-the-art synthesis of biogeochemical dynamics and the impact of human alterations at major river-coastal interfaces for advanced students and researchers.
Download or read book Floodplain River Food Webs in the Lower Mekong Basin written by Chouly Ou and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Mekong River is one of the world's most important rivers in terms of its size, economic importance, cultural significance, productivity, and biodiversity. The Mekong River's fisheries and biodiversity are threatened by major hydropower development and over-exploitation. Knowledge of river food web ecology is essential for management of the impacts created by anthropogenic activities on plant and animal populations and ecosystems. In the present study, I surveyed four tropical rivers in Cambodia within the Mekong River Basin. I examined the basal production sources supporting fish biomass in the four rivers during the dry and wet seasons and explored the relationship between trophic position and body size of fish at various taxonomic levels, among local species assemblages, and across trophic guilds. I used stable isotopes of carbon and nitrogen to estimate fish trophic levels and the principal primary production sources supporting fishes. My study provides evidence that food web dynamics in tropical rivers undergo significant seasonal shifts and emphasizes that river food webs are altered by dams and flow regulation. Seston and benthic algae were the most important production sources supporting fish biomass during the dry season, and riparian macrophytes appeared to be the most important production source supporting fishes during the wet season. In the river with strong flow regulation from an upstream impoundment, seston and benthic algae were even more important production sources supporting fishes during the dry season. My findings challenge the Eltonian theory of size-based trophic structure in food webs and also contradict the broadly accepted prediction of the fishing-down-the-food-web concept. Eltonian and fishing-down-the-food-web concepts propose that trophic level is strongly correlated with body size, but I found no significant correlation between body size and trophic position for fish assemblages. Results suggest that body size distributions are not useful for prediction the trophic structure of communities with diverse detritivores, omnivores and insectivores, but that it is a good predictor of trophic position among piscivorous fishes. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/151776
Download or read book Vegetation Ecosystem Dynamics and Restoration of Floodplains in Central Asia the Tarim River Xinjiang NW China as an Example written by Stefan Zerbe and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agricultural Land use Dynamics in the Floodplains of the Vietnamese Mekong Delta written by and published by . This book was released on 2018 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
