hydrographical monitoring Articles

  • New monitoring technology helps reveal Arctic secrets

    A group of Arctic researchers has employed the latest monitoring technology to investigate the effects of climate change, by measuring temperature and salinity in the water column beneath surface ice. The results of the investigation, which utilised YSI’s new 'Castaway-CTD', could cast new light on our understanding of the ways in which shifting ocean currents impact upon the climate in ...

  • Storm water infiltration in a monitored green roof for hydrologic restoration

    The objectives of this study are to provide detailed information about green roof performance in the Mediterranean climate (retained volume, peak flow reduction, runoff delay) and to identify a suitable modelling approach for describing the associated hydrologic response. Data collected during a 13-month monitoring campaign and a seasonal monitoring campaign (September–December 2008) at the green ...


    By IWA Publishing

  • Identifying the impact of Energy Base Water Project on groundwater using high-frequency monitoring data in the Subei Lake basin, Ordos, Northwestern China

    Groundwater is increasingly exploited for energy production in arid regions, which necessitates a deeper insight into the impact of the enhanced human pressure on the groundwater. This study applied an integrated method (statistical analysis, water table fluctuation method, hydrograph analysis and remote sensing) to identify the impact of Energy Base Water Project on the groundwater in the ...


    By IWA Publishing

  • Baseflow contribution to nitrates in an urban stream in Daejeon, Korea

    It is a well-known fact that baseflow discharge of rainfall runoff significantly impacts the quality of surface water. In this paper, the impact of nitrates discharged as baseflow on stream water quality were studied using PULSE, a hydrograph separation software developed by USGS, to calculate the monthly baseflow discharge. We took water quality and flow rate data from a monitoring station site ...


    By IWA Publishing

  • Case study - SEAWATCH Europe

    SEAWATCH Europe was a five-year SEAWATCH R&D programme for operational marine monitoring. It represented the core of SEAWATCH from which most of the SEAWATCH development was initiated. Several partners contributed to SEAWATCH Europe. Statoil, Norsk Hydro, Conoco, Norske Shell, OCN NETHERLANDS, OCEANOR and various insurance companies represented the private sector. Public sector sponsors were ...


    By Fugro OCEANOR AS

  • Temporal variability of two contrasting transient pollution events in a pastoral stream

    Two transient pollution events were monitored in a pastoral stream in southwestern Kenya to evaluate their relative contribution to diffuse pollution. Peak loads of pollutants during storm-induced transients were within 3–4 orders of magnitude higher than the short-lived (30–60 minutes) diurnal episodes provoked by in-stream activities of people and livestock. Transient yields were striking ...


    By IWA Publishing

  • Explaining differential sources of zoonotic pathogens in intensively-farmed catchments using kinematic waves

    Surveys in streams draining intensively farmed catchments can, during flood events, indicate differential time-concentration patterns between a bacterial health-risk indicator (E. coli) and a major zoonotic pathogen that it seeks to indicate—Campylobacter. The indicator's peak concentration at a monitoring station can arrive ahead of the flood peak (the pollutograph ...


    By IWA Publishing

  • Assessment of LID practices for restoring pre-development runoff regime in an urbanized catchment in southern Finland

    This study quantifies the effects of common stormwater management techniques on urban runoff generation. Simulated flow rates for different low impact development (LID) scenarios were compared with observed flow rates during different urban construction phases in a catchment (12.3 ha) that was developed from natural forest to a residential area over a monitoring period of 5 years. The Storm ...


    By IWA Publishing

  • Groundwater level response to hydrogeological factors in a semi-arid basin of Beijing, China

    In this study, the mode of groundwater level fluctuations is analyzed by statistical approaches for 51 monitoring wells located in a semi-arid basin in Beijing from 1998 to 2013. Firstly, a geostatistical method was performed to characterize the spatial and temporal behaviors of data sets and analyze the responding mechanism of groundwater level to hydrologic features using the Geostatistics ...


    By IWA Publishing

  • Water Corporation

    Introduction the Water Corporation was established under statute as a corporatized entity. The mission of the Water Corporation is to conduct a successful business providing quality water and wastewater services to customers to enhance their lifestyle and to support the future development of the State. Asset Monitoring Services was established within the Corporation to undertake data ...


    By KISTERS AG

  • Developing dry-weather flow and RDI/I models using regression analysis and unit hydrography

    InfoWorks CS has been used to build an accurate sanitary sewer flow model for Jefferson Parish, Louisiana, despite there being gaps in the available input data. Reliable predictions of the dry-weather and rainfall-dependent flows were derived by using techniques including unit hydrography and regression analysis to determine the required parameters. Jefferson Parish is close to New Orleans in the ...


    By Innovyze

  • Case study - SEAWATCH Peru

    The El Niño phenomenon, of which much has been spoken over the last few years will now be monitored by "El Instituto del Mar del Perú" (IMARPE) and the Hydrographic Service of the Peruvian Navy with the help of Fugro OCEANOR's technology. Over the last few years, many articles have been written by the media concerning EL Niño. El Niño marks the arrival of warmer water ...


    By Fugro OCEANOR AS

  • Differential behaviour of Escherichia coli and Campylobacter spp. in a stream draining dairy pasture

    The faecal indicator bacterium Escherichia coli and thermotolerant Campylobacter spp., which are potentially pathogenic, were investigated in the Toenepi Stream draining a pastoral catchment dominated by dairying. Bacteria concentrations were monitored routinely at fortnightly intervals over 12 months and intensively during storm events to compare the transport dynamics of ...


    By IWA Publishing

  • Water quality of lowland, permeable Chalk rivers: the Frome and Piddle catchments, west Dorset, UK

    This paper provides a baseline interpretation of extensive hydrochemical characteristics of UK Chalk catchments based on the Frome/Piddle (west Dorset), a major component of the LOCAR (Lowland Catchment Research) programme. It examines a wide range of chemical determinands using data from two long-term (1979–2000) river water monitoring sites. The water quality of the Frome and Piddle is very ...


    By IWA Publishing

  • Rainfall and river flows are predictors for β-glucuronidase positive Escherichia coli accumulation in mussels and Pacific oysters from the Dart Estuary (England)

    Rainfall and river flows are environmental variables influencing the microbial status of bivalve mollusc harvesting areas. This study investigated spatial and temporal relationships between rainfall, river flows and concentrations of Escherichia coli in mussels (Mytilus spp.) and Pacific oysters (C. gigas) from three harvesting areas in the Dart Estuary over the ...


    By IWA Publishing

  • Water microbial quality during drinking water treatment technology and distribution provided by two Romanian companies

    Under European Economic Area Agreement, Romania and Norway have developed a project for monitoring the quality of raw and potable water (from production technology until distribution) supplied by two Romanian water companies. In the present study was investigated the microbiological quality of water, which was compared with organic matter loads. Resulting free chlorine and trihalomethane ...


    By IWA Publishing

  • Case Study Port of Hamburg/Germany

    LOG_aLevel Storm Tide Network at the Port of Hamburg, Germany Since 2003 a Storm Tide Network from General Acoustics GmbH (GA) has been satisfactory operating at the Port of Hamburg. In a first test phase of two years a LOG_aLevel station was successfully tested by the Hamburg Port Authority (HPA) against its conventional gauges. Due to the good results in terms of accuracy and ...


    By General Acoustics e.K.

  • Sewer Sociology – The Days of Our (Sewer) Lives

    ABSTRACTFor centuries mankind has recorded life’s events through hieroglyphics, stories, and books. In similar fashion, those of us in the sewer business recognize the daily rhythm of people’s lives through the diurnal patterns of water and sewer use. Differences can be seen between weekdays, weekends, and holidays, and other distractions and disruptions of everyday life can often be seen as a ...

  • Transport of a nematicide in surface and groundwaters in a tropical volcanic catchment

    Received for publication August 7, 2008. The aim of this article is to determine how the nematicide cadusafos [S,S-di-sec-butyl O-ethyl phosphorodithioate] contaminates water and soils at two scales, subcatchment and catchment. The study site was a small banana (Musa spp.)-growing catchment on the tropical volcanic island of Guadeloupe in the Caribbean. Two application campaigns were conducted, ...

  • Land-use-based sources of pollutants in urban storm water

     ABSTRACT Urban storm water is recognized as a major source of pollution to many of the nation’s waterways. However, little is known about the mechanisms and processes that influence pollutant loadings from specific land-use types. The goals of this study were (1) to examine event mean concentrations (EMC) and fluxes of TSS, metals, PAHs, and bacteria associated with storm water runoff ...

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