groundwater discharge Articles
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Estimating the submarine groundwater and nutrients discharge of Yellow River delta with cross-section method
In this paper, cross-section method was used to estimate the groundwater and nutrients discharge fluxing to the Bohai Sea from the Yellow River Delta. The flux of shallow phreatic groundwater (within 10 m) in the Yellow River Farm discharging into sea was 2.9 × 10−5 m3/m d in 2004 and 3.1 × 10−5 m3/m d in 2005. Time distribution monthly mean flux is consistent with the Yellow River's runoff but ...
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DOT Highway Construction - Case study
Issues and Challenges: Excessive rainfall amounts Scheduling and project delays Sensitive nearby waters Stringent discharge requirements Groundwater flows Approaches and Solutions: Heavy sediment laden water threatened to breach the temporary retention basin sidewalls resulting in contamination of a nearby river. Liquid Biostar-CH was injected into the water as it was pumped from the ...
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Response of hydrological processes to permafrost degradation from 1980 to 2009 in the Upper Yellow River Basin, China
Watersheds in cold regions are undergoing climate warming and permafrost degradation, which result in quantitative shifts in surface water–groundwater interaction. Daily discharge, annual maximum frozen depth (AMFD) of seasonal frozen soil, precipitation and negative degree-day temperature were analyzed to explore changes and correlations of climate, runoff and permafrost in the Upper Yellow ...
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Agricultural runoff contaminant discharge in Dianchi Valley agricultural district, China
release of pollutants in Agricultural Runoff (AR) from a plastic canopy (PC) region in eastern Dianchi Catchment of China was investigated. The daily variation coefficients of water quantity in 2002 and 2003 were 15.9 and 7.6 respectively. From May 2002 to September 2003, local farmland had discharge of 2.9?3.2 l m2 d1. Pollutant loads from research area to Dianchi Lake from October to April were ...
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Groundwater, flooding and hydrological functioning in the Findhorn floodplain, Scotland
A large floodplain of the River Findhorn, northeast Scotland, was investigated using hydrogeological and hydrochemical methods (including residence time indicators) to characterise groundwater/surface-water coupling and groundwater flooding. The study demonstrated widespread stratification within the floodplain: shallow (<8 mbgl) deposits are highly permeable (100 m/d); deeper deposits ...
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NMR Can Measure Groundwater Directly – Even in Permafrost Environments
In permafrost landscapes, the ground remains mostly frozen throughout the year and liquid groundwater only occurs in certain locations or during anomalously warm periods. Understanding the spatial and temporal distribution of groundwater in these environments is extremely important as it can affect processes ranging from geotechnical soil stability to the release of greenhouse gases. In a ...
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Pharmaceutical occurrence in groundwater and surface waters in forests land‐applied with municipal wastewater
The occurrence and fate of pharmaceutical and personal care products in the environment are of increasing public importance due to their ubiquitous nature and documented effects on wildlife, ecosystems, and potentially humans. One potential, yet undefined, source of entry of pharmaceuticals into the environment is via the land application of municipal wastewater onto permitted lands. The ...
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The Usual Suspects - U.S. EPA 2011 - 2013 Enforcement Initiatives
The U.S. Environmental Protection Agency (U.S. EPA) has announced its 2011 through 2013 National Enforcement Initiatives to handle national environmental and public health problems. For air pollution, the initiatives include addressing air pollution from the usual suspects: the largest sources of particulate matter, nitrogen oxides, and sulfur dioxide. This includes continued recent enforcement ...
By All4 Inc.
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Leaching behavior of total organic carbon, nitrogen, and phosphorus from banana peel
The leaching behavior of organic carbon and nutrient compounds from banana peel (BP) was investigated in batch assays with respect to particle size, contact time, pH value, and temperature. The granularity, contact time, pH, and temperature caused no significant effects on the leaching of total phosphorus (TP) from the BP. The maximum leached total nitrogen (TN) content was found at pH 5.0 and ...
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Evaluating groundwater/surfacewater transition zones in ecological risk assessments
Currently, there is a common perception that the discharge of contaminated groundwater to a surfacewater body does not pose an ecological risk if contaminant concentrations in surface-water samples are below analytical detection limits or at very low concentrations. The transition zone represents a unique and important ecosystem that exists between surface-water and the underlying ground-water, ...
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Frequently Asked Questions and Troubleshooting in Activated Sludge Process (Part1)
Q: In the ordinary activated sludge process, sludge expansion will occur during the treatment of municipal sewage, with SVI>400, so it is planned to install an anaerobic selector at the front part of the aeration tank. Since there is little experience in this area, I want to find out if there is anything wrong with setting the selector larger? Now we set the anaerobic selector to account for ...
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Otis, MA municipal wastewater treatment plant information
Small and rural communities generally find it difficult to assemble the resources to develop a traditional wastewater infrastructure. Yet, without infrastructure it is difficult to enhance property values and economic development. Decentralized wastewater treatment systems represent a low cost, low impact and high benefit solution. Employing modular systems whose processes are natural and ...
By Aquapoint
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Estimation of indirect nitrous oxide emissions from a shallow aquifer in Northern Germany
Received for publication July 14, 2008. Ground water is considered to be an important source for indirect N2O emissions. We investigated indirect N2O emissions from a shallow aquifer in Germany over a 1-yr period. Because N2O accumulated in considerable amounts in the surface ground water (mean, 52.86 µg N2O–N L–1) and corresponding fluxes were high (up to 34 µg N2O–N m–2 h–1), it was ...
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Lowes Plaza commercial wastewater system information
Commercial wastewater is usually highly concentrated in organic content and complicated by sanitary routines and house keeping habits that shorten the expected life of the soil disposal system. Advanced wastewater treatment will preserve the disposal system indefinitely and often represents a one to three year return on investment for commercial facilities. This Aquapoint wastewater treatment ...
By Aquapoint
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Wastewater Environmental Compliance Made Easy
Environmental Wastewater Treatment Success Environmental Compliance Made Easy Compliance AND Profits Zero Discharge Many times zero discharge of waste water is not only necessary to meet ever more stringent environmental requirements but can increase your bottom line by allowing the reuse of waste water to a great degree. Integrated's line of Floccin™ flocculating agents has been ...
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Hydrologic and biogeochemical controls of river subsurface solutes under agriculturally enhanced ground water flow
Received for publication October 17, 2008. The relative influences of hydrologic processes and biogeochemistry on the transport and retention of minor solutes were compared in the riverbed of the lower Merced River (California, USA). The subsurface of this reach receives ground water discharge and surface water infiltration due to an altered hydraulic setting resulting from agricultural ...
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Hydrologic and biogeochemical controls of river subsurface solutes under agriculturally enhanced ground water flow
The relative influences of hydrologic processes and biogeochemistry on the transport and retention of minor solutes were compared in the riverbed of the lower Merced River (California, USA). The subsurface of this reach receives ground water discharge and surface water infiltration due to an altered hydraulic setting resulting from agricultural irrigation. Filtered ground water samples were ...
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TOTALOX Odor Eliminator: The Two Step Treatment in One Package - Case Study
Collection Systems Are Tough! With miles of pipe and multiple pumping stations, managing the complexity of a wastewater collection system is a full time job. The main task is to maintain the system and keep it flowing. But also near the top of that task list is preventing nuisance odors. When the phone starts ringing, you become a detective. First, you have to find the site or sites of odor ...
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Natural Attenuation
Introduction: Natural subsurface processes such as dilution, volatilization, biodegradation, adsorption, and chemical reactions with subsurface materials are allowed to reduce contaminant concentrations to acceptable levels. Natural attenuation is not a 'technology' per se, and there is significant debate among technical experts about its use at hazardous waste sites. Consideration of this ...
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Modeling groundwater upwelling as a control on river ice thickness
The Tanana River flows through interior Alaska, a region characterized by discontinuous permafrost. Studies link degrading permafrost to increased winter river discharge due to greater groundwater (GW) recharge increasing GW input to river baseflow. In winter, interior Alaskan rivers are exclusively fed by GW, which provides an external source of heat. In fact, some portions of rivers fed by GW ...
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