Nitrogen Cycling During Managed Recharge and Runoff PDF Download

Author: Calla M. Schmidt
Publisher:
ISBN:
Category :
Languages : en
Pages : 498

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Author: UNESCO
Publisher: UNESCO Publishing
ISBN: 9231004883
Category : Political Science
Languages : en
Pages : 366

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Author: Yanjun Shen
Publisher: CRC Press
ISBN: 1040113087
Category : Science
Languages : en
Pages : 210

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Book Description
This book is a unique text that explores recent research on the management of sustainable groundwater use in the North China Plain (NCP), where aquifers are suffering the most severe over‐pumping in the world and have caused serious ecological degradation. It contains research conducted by the editor and his teams on several projects over the past 18 years. Key topics covered include: comprehensive scheme and pathways to achieve sustainable groundwater management description of theoretical basis for water saving and technologies developed in practice at field scale adjusting cropping patterns and planting structure to reduce the cultivation intensity to a suitable extent soft measures such as water metering, pricing, and water marketing being applied in groundwater management practice in the NCP It will be an invaluable resource to graduate students, education and research staff, and agriculture or water resources authorities.

Author: Scott W. Ator
Publisher: Geological Survey (USGS)
ISBN: 9781411332621
Category : Chesapeake Bay Watershed
Languages : en
Pages : 27

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Book Description
Spatially Referenced Regression on Watershed Attributes (SPARROW) was used to provide empirical estimates of the sources, fate, and transport of total nitrogen (TN) and total phosphorus (TP) in the Chesapeake Bay watershed, and the mean annual TN and TP flux to the bay and in each of 80,579 nontidal tributary stream reaches. Restoration efforts in recent decades have been insufficient to meet established standards for water quality and ecological conditions in Chesapeake Bay. The bay watershed includes 166,000 square kilometers of mixed land uses, multiple nutrient sources, and variable hydrogeologic, soil, and weather conditions, and bay restoration is complicated by the multitude of nutrient sources and complex interacting factors affecting the occurrence, fate, and transport of nitrogen and phosphorus from source areas to streams and the estuary. Effective and efficient nutrient management at the regional scale in support of Chesapeake Bay restoration requires a comprehensive understanding of the sources, fate, and transport of nitrogen and phosphorus in the watershed, which is only available through regional models. The current models, Chesapeake Bay nutrient SPARROW models, version 4 (CBTN_v4 and CBTP_v4), were constructed at a finer spatial resolution than previous SPARROW models for the Chesapeake Bay watershed (versions 1, 2, and 3), and include an updated timeframe and modified sources and other explantory terms.

Author:
Publisher:
ISBN:
Category : Hydrology
Languages : en
Pages : 756

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Author: Mark D. Munn
Publisher: United States Department of the Interior
ISBN: 9781411341838
Category : Nature
Languages : en
Pages : 92

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Book Description
"National Water-Quality Assessment Project."

Author: Xianbiao Lin
Publisher: Frontiers Media SA
ISBN: 2832515215
Category : Science
Languages : en
Pages : 238

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Book Description

Author:
Publisher: DIANE Publishing
ISBN: 1428909699
Category :
Languages : en
Pages : 340

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Book Description

Author: Peter Dillon
Publisher: MDPI
ISBN: 3039430424
Category : Science
Languages : en
Pages : 408

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Book Description
This book is a hard copy of the editorial and all the papers in a Special Issue of the peer-reviewed open access journal ‘Water’ on the theme ‘Managed Aquifer Recharge for Water Resilience’. Managed aquifer recharge (MAR) is the purposeful recharge of water to aquifers for subsequent recovery or environmental benefit. MAR is increasingly used to make water supplies resilient to drought, climate change and deteriorating water quality, and to protect ecosystems from declining groundwater levels. Global MAR has grown exponentially to 10 cu.km/year and will increase ten-fold within a few decades. Well informed hydrogeologists, engineers and water quality scientists are needed to ensure that this investment is effective in meeting increasingly pressing needs. This compilation contains lessons from many examples of existing projects, including several national and continental summaries. It also addresses the elements essential for identifying and advancing projects such as mapping aquifer suitability and opportunities, policy matters, operational issues, and some innovations in MAR methods and monitoring. This collection exemplifies the state of progress in the science and practice of MAR and is intended to be useful, at least to water managers, water utilities, agricultural water users and urban planners, to facilitate water resilience through new MAR projects.

Author: National Research Council
Publisher: National Academies Press
ISBN: 0309051428
Category : Nature
Languages : en
Pages : 300

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Book Description
As demand for water increases, water managers and planners will need to look widely for ways to improve water management and augment water supplies. This book concludes that artificial recharge can be one option in an integrated strategy to optimize total water resource management and that in some cases impaired-quality water can be used effectively as a source for artificial recharge of ground water aquifers. Source water quality characteristics, pretreatment and recharge technologies, transformations during transport through the soil and aquifer, public health issues, economic feasibility, and legal and institutional considerations are addressed. The book evaluates three main types of impaired quality water sourcesâ€"treated municipal wastewater, stormwater runoff, and irrigation return flowâ€"and describes which is the most consistent in terms of quality and quantity. Also included are descriptions of seven recharge projects.