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Book Nutrient Trends and Land Use Changes in Selected Watersheds in the Lower Susquehanna River Basin

Download or read book Nutrient Trends and Land Use Changes in Selected Watersheds in the Lower Susquehanna River Basin written by U. S. Government Printing Office (Gpo) and published by BiblioGov. This book was released on 2013-07 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: The United States Government Printing Office (GPO) was created in June 1860, and is an agency of the the U.S. federal government based in Washington D.C. The office prints documents produced by and for the federal government, including Congress, the Supreme Court, the Executive Office of the President and other executive departments, and independent agencies. The Coastal Zone Information Center (CZIC) collection provides access to nearly 5,000 coastal related documents that the U.S. Government Printing Office (GPO) received from the National Oceanic and Atmospheric Administration (NOAA) Central Library. The collection provides almost 30 years of data and information crucial to the understanding of U.S. coastal management and NOAA's mission to sustain healthy coasts. This is one of their documents.

Book Selected Water Resources Abstracts

Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1990 with total page 772 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Selected Water Resources Abstracts

Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1988 with total page 1212 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Commodity and Resource Policies in Agricultural Systems

Download or read book Commodity and Resource Policies in Agricultural Systems written by Richard E. Just and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 399 pages. Available in PDF, EPUB and Kindle. Book excerpt: Agricultural, natural resource, and environmental problems are becom ing increasingly interdependent. For example, soil erosion is largely determined by agricultural land use. Both water use and water con tamination depend on land use and technology choice in agriculture. In many areas, the fertilizers and pesticides used in agriculture are ma jor pollutants of ground and surface water, having adverse effects on drinking water and fisheries. Agricultural pollutants such as pesticides also produce adverse health effects for agricultural workers and the consuming public. On the other hand, the availability of water resources and the value of competing land uses influence agricultural production. Additionally, regional air quality problems may affect crops and global environmental trends may have long-term implica tions for farming. Agriculture, natural resources and environmental quality are all heavily regulated in the U. S. , but they are done so by a vast array of competing or unrelated agencies within the U. S. Departments of Agriculture, Interior, and Commerce, the Environmental Protection Agency; and numerous state agencies. Considering the large number of bureaucratically remote public agencies involved and the pervasive in terdependencies between agriculture, natural resources and the environ ment, policies develop which are at best uncoordinated and at worst conflicting and counterproductive. These policies have become sources of controversy as different interest groups struggle to affect their im plementation, as different agencies have fought for administrative con trol and as legislative bodies have attempted to enact piecemeal changes.

Book Hydrology and the Effects of Selected Agricultural Best management Practices in the Bald Eagle Creek Watershed York County Pennsylvania Prior to and During Nutrient Management

Download or read book Hydrology and the Effects of Selected Agricultural Best management Practices in the Bald Eagle Creek Watershed York County Pennsylvania Prior to and During Nutrient Management written by Michael J. Langland and published by . This book was released on 1995 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Water resources Investigations Report

Download or read book Water resources Investigations Report written by and published by . This book was released on 2001 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Managing Sediments and Nutrients in the Susquehanna River Basin

Download or read book Managing Sediments and Nutrients in the Susquehanna River Basin written by Edmond E. Seay and published by . This book was released on 1995 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Temporal Changes of Nutrients Within the Lower Grand River Watershed and Selected Sites

Download or read book Temporal Changes of Nutrients Within the Lower Grand River Watershed and Selected Sites written by Weston Scott Duley and published by . This book was released on 2019 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This report presents the results of a study carried out in collaboration with the U.S. Geological Survey (USGS) and the Missouri Department of Natural Resources (MDNR) to estimate total nitrogen (TN) and total phosphorus (TP) at five USGS monitoring sites within Lower Grand River Watershed (LGRW) and two monitoring sites on the Missouri River. The objective of this study was to quantify temporal changes in TN and TP concentrations and compare those to best management practices (BMPs). In this study, the approach to the analysis of long-term surface water-quality data by using Weighted Regressions on Time, Discharge and Seasons models (WRTDS). The model method is formulated to enable flexibility in long-term trend representations, discharge-related components, and concentrations of TN and TP seasonal components. The WRTDS model is designed make estimates of the actual concentrations and fluxes as well as estimates that eliminate the influence of year-to-year variations in discharge. The method is designed to use weighted regressions on time, discharge and season to estimate concentrations. This method is designed to be a tool which identifies changes that are taking place within a watershed related to surface-water nonpoint sources of contamination. In this case, the results given by the WRTDS models were used to determine if best management practices implemented over the study period, have had any significant effect on TN and TP concentrations. At each monitoring location, water quality data was compared to temporal changes within the watershed to determine the effectiveness of BMPs implemented over the study period"--Abstract, page iii.

Book EPA s 2008 Report on the Environment

Download or read book EPA s 2008 Report on the Environment written by and published by . This book was released on 2008 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: [The report]... provides the American people with an important resource from which they can better understand trends in the condition of the air, water, land, and human health of the United States. This report uses scientifically sound measures, called indicators, to address fundamental questions relevant to the EPA's mission to protect the environment and human health. To accomplish its mission to protect human health and the environment, EPA must pay close attention to trends in the condition of the Nation's environment. This kind of information, which is captured in EPA's 2008 ROE, can help EPA to prioritize its work and to focus on human health and ecological activities that can lead to improvements in the conditions of the Nation's environment.

Book UNDERSTANDING THE EFFECTS OF HYDROLOGIC CONNECTIVITY LAND USE AND LITHOLOGY ON WATER QUALITY ACROSS SCALES

Download or read book UNDERSTANDING THE EFFECTS OF HYDROLOGIC CONNECTIVITY LAND USE AND LITHOLOGY ON WATER QUALITY ACROSS SCALES written by Callum Richard Wayman and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Agricultural land use impacts groundwater and surface water quality and many research programs have aimed to understand these impacts. For example, loading of agriculturally derived solutes such as nitrate can create hypoxic conditions in stream estuaries downstream of agricultural and human development. This problem exists in the Chesapeake Bay watershed, a 11,600 km2 watershed which encompasses six states: Delaware, Maryland, New York, Pennsylvania, Virginia, and West Virginia. The largest contributor of water and nutrients to the Chesapeake Bay is the Susquehanna River Basin. It is important to understand the transport dynamics within smaller tributary watersheds of the Susquehanna River, so that efforts can be made to mitigate the effects of farming on nutrient pollution in the Chesapeake Bay.The Susquehanna Shale Hills Critical Zone Observatory (SSHCZO) has been established to understand water quality in the context of natural geological background conditions within the critical zone. The SSHCZO is an observatory in the uplands of the Susquehanna River Basin. The SSHCZO spans the Shavers Creek watershed (120 km2), a HUC 10 watershed. This creek is a tributary of the Juniata River, which drains into the Susquehanna River. The SSHCZO contains three instrumented subcatchments: Shale Hills (0.08 km2), Garner Run (1.21 km2), and Cole Farm (0.34 km2). These three sites provide land use and lithology end members that serve as proxies for the rest of Shavers Creek watershed. In addition to using small catchment end-members to understand transport in Shavers Creek, three separate synoptic sampling campaigns were completed at high spatial resolution throughout the watershed. These three campaigns show how changes in hydrologic connectivity, land use, and lithology affect water quality in the watershed. Fall and winter synoptic campaigns highlight discrepancies in water and solute influxes between expected solute loads from tributary inputs to the mainstem and the measured solute loads at mainstem sites. These discrepancies suggest input from groundwater or runoff sources other than sampled tributaries. For example, both nitrate and chloride are both input from sources other than tributaries. Principal component analyses and a mixing analysis performed on the fall synoptic data (during the dry season) are best explained as documenting groundwater inputs to the mainstem of Shavers Creek as local interflow, i.e. shallow groundwater flow. Thus, tributaries and Shavers Creek become locally controlled during the dry period. Principal components for surface water chemistry in Shavers Creek vary in the main stem and in tributaries during this period. The components determined for the upland forested parts of Shavers Creek cluster more closely with the components which describe shallow interflow within the forested landscape as observed in the pristine forested subcatchments of Garner Run and Shale Hills while components determined for the lowland agricultural parts of Shavers Creek trend towards the components which describe shallow interflow in the agricultural catchment Cole Farm. Principal component analyses during the winter snow melt (a wet period) are consistent with a regional homogenization of water chemistry in Shavers Creek caused by the dominance of snow water inputs to interflow, i.e. nonlocal control. Specifially, principal components for surface water chemistry in Shavers Creek during snow melt are all clustered closely to components which reflect forested land use. This clustering highlights the homogenization of surface water chemistry from the wet winter synoptic.Two separate regression models for Shavers Creek, one using lithology and the other using land use as model inputs, show that each of these variables alone predict solute flux well in the fall during the local control exhibited in the dry period. However, the covariance of land use and lithology in the watershed that causes a confounding effect for the regression models, because land use varies with lithology. On the other hand, these same models, show that land use alone does not predict solute flux as well as lithology during the wet winter period of non-local control. Lithology is therefore the best predictor of solute flux spatially in Shavers Creek in both wet and dry periods. Land use is only as good of a predictor as lithology during periods of local control when water tables are low in the watershed. Variations in local versus nonlocal control on solute and water flux contributions to Shavers Creek is related to hydrologic connectivity. Local controls, defined as properties that control water transport at small spatial scales, are more significant during the dry season when water tables are low. In contrast to local controls such as soil properties, nonlocal controls dominate during wet periods in Shavers Creek. The nonlocal controls include larger scale characteristics such as watershed topography.In summary, both principal component analyses and regression modeling show distinct geochemical differences between the dry fall period and the wet winter period in Shavers Creek watershed. The dry fall period shows geochemical heterogeneity throughout the watershed, and solute flux can be predicted by lithology and land use. During this time, the watershed is hydrologically disconnected and surface water chemistry is controlled locally. In contrast, hydrologic connectivity in the watershed increases during the wet winter period and surface water chemistry is controlled largely by nonlocal properties. During this time, geochemical homogeneity is observed throughout the watershed and solute flux is better predicted by lithology than land use. Overall, lithology is the most consistent predictor of the spatial variation of solute flux in Shavers Creek and is therefore essential to understanding solute transport in the watershed. These findings provide a deeper insight into transport dynamics in Shavers Creek and could potentially inform an improved understanding of upland agricultural watersheds within the Susquehanna River Basin.

Book New Publications of the U S Geological Survey

Download or read book New Publications of the U S Geological Survey written by and published by . This book was released on 1990 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: