Runoff Sampling Articles & Analysis: Older
32 articles found
As winter melts into spring, environmental field teams gear up for one of the busiest times of the year: the spring sampling season. With snowmelt runoff, rising groundwater levels, and increased mobility in field conditions, spring is a critical window for collecting representative groundwater samples—especially in regions impacted by ...
Adding to the challenge of BOD treatment are potential confounding factors inherent in testing for BOD concentrations in stormwater samples: a short hold time for BOD samples can complicate sample collection and accurate measurement in the lab; analytical test methods can be expensive, time-consuming, and difficult to QC; and other pollutants in ...
To reduce the costs associated with stream water sampling, it is important to choose sampling times with a high information content. ...
Surface water samples in Vietnam were collected from the Saigon River, rural and suburban canals, and urban runoff canals in Ho Chi Minh City, Vietnam, and were processed to enumerate Escherichia coli. ...
Based on the observed data of monthly precipitation and runoff from 1960 to 2011 in the catchment controlled by the Sandaohezi hydrological station, the double mass curve of precipitation-runoff and Kolmogorov–Smirnov dual sample test were applied to divide the years 1960–2011 into four periods: 1960–1979, 1980–1991, 1992–1999 and 2000–2011. ...
This study aims to explore the influential sources of organic matter in first flush runoff from urban roadways by comparing organic carbon content and particle size distribution in road dust with those from discharge from vehicles during rainfall. Samples on first flush runoff and road dust were collected from urban roadways. ...
This study aims to explore the influential sources of organic matter in first flush runoff from urban roadways by comparing organic carbon content and particle size distribution in road dust with those from discharge from vehicles during rainfall. Samples on first flush runoff and road dust were collected from urban roadways. ...
This study evaluated the effect of rainfall data resolution on the model performance when predicting runoff. We examined hourly, 3-hourly, 12-hourly, and 24-hourly temporal resolutions, and spatial resolutions from seven to one rain gauges. ...
Understanding the sources of chemical components in roof runoff can help to prevent water quality problems in rooftop rainwater harvesting. To identify the contribution of wet deposition to the mass of components in roof runoff, the samples from air, rainwater, dust buildup and roof runoff were collected from an urban site in ...
As urbanization increases, urban runoff is an increasingly important component of total urban non-point source pollution. In this study, the properties of urban runoff were examined in Shenyang, in northeastern China. Runoff samples from a tiled roof, a concrete roof and a main road were analyzed for key pollutants (total ...
Rainwater harvesting (RWH) systems have the unique ability to contribute to stormwater management goals via mitigation of runoff volumes and peak flow rates. Additionally, collecting and storing runoff via RWH systems can potentially provide water quality benefits due to physical and chemical processes that occur within the storage tank. This study quantified ...
The protection of drinking water from pathogens such as Cryptosporidium and Giardia requires an understanding of the short-term microbial release from faecal contamination sources in the catchment. Flow-weighted samples were collected during two rainfall events in a stream draining an area with on-site sewers and during two rainfall events in surface runoff ...
The effect of the time step of calibration data on the performance of a hydrological model is examined through a numerical experiment where HYMOD, a rainfall–runoff model, is calibrated with data of varying temporal resolution. A simple scaling relationship between the parameters of the model and modelling time step is derived which enables information from daily hydrological records to ...
Thus, the objectives of this study were to quantify the levels and transport mechanism of faecal coliforms (FCs) from residential and commercial catchments. Stormwaters were sampled and the runoff flow rates were measured from both catchments during four storm events in Skudai, Malaysia. The samples were then analysed for FC, biochemical oxygen ...
Contaminant loading associated with stormwater runoff from recently burned areas is poorly understood, despite the fact that it has the potential to affect downstream water quality. The goal of the present study is to assess regional patterns of runoff and contaminant loading from wildfires in urban fringe areas of southern California. Postfire stormwater ...
The nonbioremediated treatment consisted of soil spraying with 10 times the RD of Atrazerba (d 0). After 7 d of treatment, samples of soil (and eluates), runoff, and leachate were collected for ecotoxicological tests with plants (Avena sativa and Brassica napus) and microalgae (Pseudokirchneriella subcapitata) species. ...
Because this site drains to Lake Washington and the Montlake Cut the City of Seattle has put extra emphasis on protecting surface water from contaminated stormwater runoff. In fact, the city routinely samples stormwater discharges from the site and will not allow any degradation of lake water quality. Consistent, high-quality stormwater runoff ...
Bacteria concentrations were measured over the entire storm duration from 8 different LU types over 13 storm events in 5 southern California watersheds during the 2000–2005 storm seasons. In addition, runoff samples were collected from 8 bottom of the watershed mass emission (ME) sites. ...
Highway runoff is a significant source of contaminants entering many freshwater systems. To provide information on effects of highway runoff on aquatic biota, runoff samples were collected from three sites representing different classes of highways with low, intermediate and high traffic intensities. ...
Between 2007 and 2009, cyanide was measured in parking lot runoff after deicer application, runoff from an urban snow disposal site and stormwater ponds. Parking lot runoff concentrations were highest, with 42% of samples displaying WAD cyanide and 97% containing total cyanide at concentrations higher than the method detection ...