Download or read book Imprints of the Land Spatial and Temporal Connections Between Land Use and Water Quality written by Janet Barclay and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Human activity and land use patterns are altering solute concentrations in waterbodies worldwide, frequently with effects that are delayed and/or displaced from their cause. Understanding the resulting water quality trends allows managers to tailor interventions and preemptively respond to likely future conditions. My research addressed two broad questions: 1) How and why does surface water quality vary spatially? Many U.S. states classify waterbodies according to groups of designated uses, suggesting that water quality and classifications are correlated. The relationship between classification and water quality, however, is untested. I analyzed existing data for the State of Connecticut to identify differences in water quality between waterbody classes and as a function of land cover (Chapter 1). My results suggest that land cover is a better proxy for water quality than classification. 2) What is the role of groundwater in delivering nitrogen to streams and rivers, and removing nitrogen through denitrification? Reactive nitrogen applied to land surfaces percolates with precipitation and moves along groundwater flowpaths before discharging to surface waters. Patterns of groundwater discharge are difficult to measure and predict due to spatial heterogeneity. I explored the feasibility of using regional groundwater models and thermal infrared imagery to identify areas of groundwater discharge at the regional-scale. I implemented a suite of groundwater models using common assumptions to quantify precision in modeled flowpath characteristics (Chapter 2). Then, I used thermal infrared imagery and extensive field surveys to compare modeled and observed patterns (Chapter 3). I found substantial variation in modeled flowpath characteristics among models, but that thermal infrared imagery was a useful tool for evaluating modeled patterns. Groundwater discharges can deliver large nitrogen loads to streams and rivers, but nitrogen can also be removed by microbial processes along groundwater flowpaths. I analyzed discharging groundwater from spatially extensive surveys to quantify patterns of nitrogen loading to surface waters and removal within the groundwater system. Then, I used land cover, soil, and flowpath characteristics to quantify patterns of nitrogen loading and removal at the watershed scale (Chapter 4). I found that removal dominates in forested areas, and loading dominates where development and agriculture overlay coarse sediments.

Download or read book Land Use and Water Quality written by Brian Kronvang and published by MDPI. This book was released on 2020-11-18 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: This collection of 11 papers introduces broad topics covering various professional disciplines related to the research arena of land use and water quality. The papers exemplify the important links between agriculture and water quality in surface and ground waters as well as the pollution problems around urban areas. Advancement of new technologies for analyzing links between land use and water quality problems as well as insights into new tools for analyzing large monitoring datasets are highlighted in this collection of papers.

Download or read book Spatial and Temporal Trends in Water Quality in a Mixed use Landscape written by Thadshayini Chandrakumaran and published by . This book was released on 2018 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: The eutrophication of aquatic ecosystems is a growing water quality concern as it can promote the proliferation of harmful algal blooms that have severe environmental, health, and economic impacts. In United States alone, it is estimated that the combined costs of the impact of cultural eutrophication is $2.2 billion. Phosphorus (P) is considered the primary limiting nutrient for algae in freshwater systems, and agriculture is generally recognized as the dominant source of P from the landscape. However, much less is known about the role of urban nonpoint source (NPS) P losses, in part due to the variety of land uses within these areas (residential, industrial, commercial, etc.). Therefore, considering that there is a projected increase in urbanization and a global recognition to reduce nutrient enrichment, a greater understanding of the role of urban areas in P transport is required. Here, water quality changes were investigated in an urbanized portion of the Grand River watershed at two different spatial scales: along the mainstem of the 7th order Grand River and the headwater reaches of Laurel Creek. The Weighted Regression on Time, Discharge, and Season (WRTDS) method was used to quantify how much total phosphorus (TP) and total suspended solids (TSS, as fine sediment is the primary vector for the transport of P) was transported to each reach. The variability in mass loads and yields due to random fluctuations in discharge were removed through flow-normalization so that water quality trends due to landscape changes could be evaluated. Key source areas were then identified by comparing temporal and spatial trends in water quality to trends in landcover using aerial imagery and GIS landcover data. There were similar findings at the two scales considered; urban areas have the potential to exceed the TP and TSS yields observed in agricultural areas as substantial deterioration of water quality was observed during the initial phases of construction (i.e., land clearing). However, once construction was completed, the water quality impacts declined. Although elevated TSS and TP yields after urbanization eventually improve, stream flows may remain elevated and more variable than those observed in reference catchments. At the smaller scale, while there was a 40% increase in stream flow in the reference catchment over the study period, the streamflow in the urbanized catchment increased by over 700%. The observed increases in stream flow were likely attributable to increased runoff from impervious groundcover and resuspension of river sediment (originating from urban sources) at higher stream flows. Therefore, urban areas have the potential to convey large mass loads of TSS and TP, even after their concentrations decrease. Accordingly, BMPs that focus on reducing runoff may be beneficial in developed areas. This study also emphasized that land use must be viewed as dynamic when assessing its impact on water quality, as the changes in land use themselves can drive changes in water quality. This was especially important in an area like the studied region where land that was historically agricultural, which may have legacy stores of P, is disturbed and converted to urban land. Lastly, multiple spatial scales should be used to investigate the effects of land use on water quality. At smaller spatial scales, potentially confounding factors such as differences in geology, soils, slope/aspect, vegetation type, and hydroclimatic variability can be effectively controlled to identify the effects of land use on water quality. The observations that are made at smaller spatial scales can then be validated at larger spatial scales to ensure that observed trends and processes do not represent only localized phenomena, but rather larger watershed-scale effects that can inform water management controls and priorities. Lastly, this investigation underscores the need for a coordinated monitoring effort to maximize the utility of monitoring data in decision-making. It is critical that various jurisdictional levels of government and other stakeholders communicate objectives and coordinate monitoring efforts to take advantage of economies of scale, reduce redundancies, and collect data that can be integrated meaningfully to address monitoring objectives.

Download or read book Impacts of Landscape Change on Water Resources written by Manoj K. Jha and published by MDPI. This book was released on 2020-11-13 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: Changes in land use and land cover can have many drivers, including population growth, urbanization, agriculture, demand for food, evolution of socio-economic structure, policy regulations, and climate variability. The impacts of these changes on water resources range from changes in water availability (due to changes in losses of water to evapotranspiration and recharge) to degradation of water quality (increased erosion, salinity, chemical loadings, and pathogens). The impacts are manifested through complex hydro-bio-geo-climate characteristics, which underscore the need for integrated scientific approaches to understand the impacts of landscape change on water resources. Several techniques, such as field studies, long-term monitoring, remote sensing technologies, and advanced modeling studies, have contributed to better understanding the modes and mechanisms by which landscape changes impact water resources. Such research studies can help unlock the complex interconnected influences of landscape on water resources in terms of quantity and quality at multiple spatial and temporal scales. In this Special Issue, we published a set of eight peer-reviewed articles elaborating on some of the specific topics of landscape changes and associated impacts on water resources.

Download or read book Hearings Reports and Prints of the Senate Committee on Interior and Insular Affairs written by United States. Congress. Senate. Committee on Interior and Insular Affairs and published by . This book was released on 1969 with total page 1624 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Assessing the Relationships Between the Spatial Variation in Land use Spatial Patterns and Surface Water Quality written by Majed A. Khater and published by . This book was released on 2005 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Climate and Land Use Impacts on Natural and Artificial Systems written by Margarit Mircea Nistor and published by Elsevier. This book was released on 2021-07-20 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Climate and Land Use Impacts on Natural and Artificial Systems: Mitigation and Adaptation provides in-depth information on the linkages between climate change and land use, how they are related, how land use is shifting over time, and the major global regions at risk for climate and land use changes. This comprehensive resource discusses climatic factors and processes that impact natural and artificial systems, as well as the relationship between climate change and both natural and man-made hazards. The book includes case studies and original maps to provide real-life examples of climate change and land use over regions around the globe. In addition, the book presents future perspectives on mitigation and adaptation of the climate change impact. - Summarizes current research on land use and climate change - Provides future perspectives on climate change using climate models - Includes case studies to provide real-life examples from various countries - Incorporates high level graphics, images, and maps to support reviews and case studies

Download or read book The Relationship Between Land Use land Cover and Water Quality for Hydrophobic Organic Compounds written by Charles Shiu Wong and published by . This book was released on 1998 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Seine River Basin written by Nicolas Flipo and published by Springer Nature. This book was released on 2021-01-30 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book reviews the water-agro-food and socio-eco-system of the Seine River basin (76,000 km2), and offers a historical perspective on the river’s long-term contamination. The Seine basin is inhabited by circa 17 million people and is impacted by intensive agricultural practices and industrial activities. These pressures have gradually affected its hydrological, chemical and ecological functioning, leading to a maximum chemical degradation between the 1960s and the 1990s. Over the last three decades, while major water-quality improvements have been observed, new issues (e.g. endocrine disruptors, microplastics) have also emerged. The state of the Seine River network, from the headwaters to estuary, is increasingly controlled by the balance between pressures and social responses. This socio-ecosystem provides a unique example of the functioning of a territory under heavy anthropogenic pressure during the Anthropocene era. The achievements made were possible due to the long-term PIREN Seine research program, established in 1989 and today part of the French socio-ecological research network “Zones Ateliers”, itself part of the international Long-term Socio-economic and Ecological Research Network (LTSER). Written by experts in the field, the book provides an introduction to the water budget and the territorial metabolism of the Seine basin, and studies the trajectories and impact of various pollutants in the Seine River. It offers insights into the ecological functioning, the integration of agricultural practices, the analysis of aquatic organic matter, and the evolution of fish assemblages in the Seine basin, and also presents research perspectives and approaches to improve the water quality of the Seine River. Given its scope, it will appeal to environmental managers, scientists and policymakers interested in the long-term contamination of the Seine River.

Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1987 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Detecting Relationships Between Land Use and Water Quality Trends written by Nancy Elizabeth Gove and published by . This book was released on 2001 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Spatial and Temporal Analysis of the Impact of Rainfall Events and Land Use on River Water Quality written by Samira Emadi and published by . This book was released on 2017 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract - if sent.

Download or read book Relationship Between Land Use Features at Varying Scales and Water Quality Within a Southeastern New York Watershed written by Melissa A. Kalvestrand and published by . This book was released on 2009 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hearings Reports and Prints of the House Committee on the District of Columbia written by United States. Congress. House. Committee on the District of Columbia and published by . This book was released on 1966 with total page 1382 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of The 9th International Conference on Water Resource and Environment written by Chih-Huang Weng and published by Springer Nature. This book was released on with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Digital Soil Assessments and Beyond written by Budiman Minasny and published by CRC Press. This book was released on 2012-07-24 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: Digital soil assessments and beyond contains papers presented at the 5th Global Workshop on Digital Soil Mapping, held 10-13 April 2012 at the University of Sydney, Australia. The contributions demonstrate the latest developments in digital soil mapping as a discipline with a special focus on the use of map products to drive policy decisions partic

Download or read book How Do Population Growth Land use Regulations and Precipitation Patterns Affect Water Use written by Daniel P. Bigelow and published by . This book was released on 2015 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: Further, the variance of total water use is decreasing in population density, as more sprawl-like development outcomes have a relatively wider array of potential spatial patterns associated with new land development. In the broadest sense, my dissertation highlights the interplay between population growth, climate change, land-use regulations, and the spatial patterns associated with both non-urban water endowments and new land development. The intermediate link that land-use change provides between climate change and population growth and water use has yet to be acknowledged and given proper treatment in the existing literature. Moreover, the connection between land-use change and water use emphasizes the inherent spatial heterogeneity in how water is used. Given the ubiquity of policies worldwide that impose location-specific constraints on water use, my analysis suggests that spatial considerations should be taken into account in subsequent studies that aim to analyze localized patterns of water use and how they may evolve in the future.