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Showing 1 to 16 of 16 for “"Drainage ditch"”.
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Using temperature profiles to investigate the hyporheic zone in an agricultural drainage ditch
… water system to include the man-made drainage ditch environment. The goal of this research is to use vertical temperature profiles as a means to identify locations along the drainage ditch where surface water/ground water exchange takes place within the hyporheic zone. To achieve this, …
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Modeling nitrate in tile-drained watersheds of east-central Illinois
… direct links between leached nitrate and surface drainage systems. The purpose of this study was to develop a model for predicting flow and nitrate loading in a surface drainage ditch at the outlet of a tile-drained watershed. In particular, relationships were developed for the upper portion of …
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The effect of distance between artificial drainage facilities and disposal trenches on the movement of biological and chemical pollutants from septic tank effluent
… determine the effect of setback distances from a drainage ditch on the disposal of septic tank effluent. The study was done from September 1979 to August 1981. The soil used is the Tomotley series belonging to the fine-loamy, mixed, thermic family of Typic Ochraquults. Four prototype trenches were …
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Sediments and Structures of Part of Glacial Lake Agassiz in Grand Forks County, North Dakota
… The lacustrine sediments, as exposed in a drainage ditch along the east edge of sections 16, 21, and 28, T. 154 N., R. 52 W., northwest of Manvel, North Dakota, have been divided into two main groups: the lower bedded clays overlain by bedded, silty clays and silt. Separating these units is …
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The Impact of a Rapidly Growing Community on Surface Water Quality: a Study of Branson, Missouri and Lake Taneycomo in Southwestern Missouri
… at sample site eight (the mouth of a drainage ditch), although no clear trends appeared. Volume of water had no detectable effect on the level of heavy metals found in the sediments. Regression analysis showed no definite positive correlation between most metals. Therefore there is no …
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Environmental DNA (eDNA) Metabarcoding: Analysis of Freshwater Macroinvertebrate Community Structure and Diversity
… watershed and Orianna Brook Watershed) and one drainage ditch in Marquette County (MI, USA). I performed eDNA sampling to determine community richness and variability within and among each watershed, and I targeted cytochrome c oxidase I (COI) for amplicon sequencing. I analyzed the resulting …
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The Influence of Bank Vegetation on Flow Structure Within a Small Agricultural Stream: Implications for Channel Stability
… River, a small inset channel at the bottom of a drainage ditch in East Central Illinois. The three-dimensional velocity data analysed in this study was collected at seven cross sections using an acoustic Doppler velocimeter. The analyses of contour and vector plots of velocity, turbulent kinetic …
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Investigation of small mammal species richness, abundance, and genetic population structure on and around the Eastern Washington University Prairie Restoration Site
… at one site, within an agricultural area near a drainage ditch. We conducted STRUCTURE analysis and calculated FIS and FST to determine gene flow occurring between populations of P. maniculatus on and around the EWU Prairie Restoration Site. We found high levels of gene flow occurring between and …
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Soil erosion and suspended sediment dynamics in intensive agricultural catchments
… sizes partitioned by abundant hedgerows and high drainage ditch densities) resulting in low field-to-channel connectivity. Variations in suspended sediment yield between catchments were explained primarily by soil permeability and ground cover, whereby arable land use on poorly-drained soils were …
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HYDROLOGICAL CHARACTERIZATION OF A SULPHIDE WASTE ROCK DUMP
Acid rock drainage (ARD) from sulphide bearing waste rock dumps poses a serious threat to the environment and has become problematic to the mining industry. Water that is discharged from sulphide waste rock dumps has the potential to be low in pH, thus having the ability to transport heavy metals. …
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Testing the efficacy of mitigation measures for reducing fine sediment and associated pollutant delivery to and through rivers in agricultural catchments of England
… of a retention pond, improvements to a drainage ditch) effectively reduced inputs of sediment and associated contaminants to the river, however, this had little positive impact on the river due to greater importance of inputs from other sources. The riparian buffers were reducing fine …
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Old and subsurface water contributions to storm runoff generation in flat, fractured, clayey terrain.
… study. Water samples were collected from the drainage ditch, groundwater monitoring wells, subsurface collection pits, tile drains and surface runoff collecting systems. Isotopic (oxygen-18 "$\sp{18}O'')$ and chemical (electrical conductivity "EC", chloride "Cl$\sp-''$ and dissolved silica …
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Impact of Substrate on Nutrient Removal in In-Ditch Bioreactors
Drainage ditches, or grassed waterways, collect nutrient-laden runoff from agricultural fields and transport it to nearby waterbodies. The high nitrogen and phosphorus content in this water leads to negative effects, such as eutrophication in the receiving waters. In-ditch bioreactors are a simple, …
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Evaluating the Two-Stage Ditch as a New Best Management Practice
<p>A two-stage ditch involves modifications of a traditional drainage ditch to resemble more the features of a natural stream. The idea is to create or simulate extended benches on both sides of the ditch that would develop naturally over a period of time in a stream because of geomorphological …
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A HYDROLOGICAL INVESTIGATION OF THREE DEVON SAND DUNE SYSTEMS; BRAUNTON BURROWS, NORTHAM BURROWS AND DAWLISH WARREN
… permeability, was restricting the inland lateral drainage regime and was controlling both the shape and elevation of the water table. At Northam the groundwater system was also mounded and again the shape and elevation of the water table were dependent upon effective precipitation. Unfortunately …
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Phosphorus fate and management on the Somerset Levels and Moors Ramsar ditch systems
… in surface waters worldwide. Freshwater wetland ditches afflicted by these conditions undergo a shift from primarily submerged aquatic vegetation to algae or duckweed dominance, leading to excessive shading and anoxic conditions. Phosphorus, from both point (e.g., wastewater treatment works) and …