IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Hydro-environment : Modelling fate and transport of escherichia coli and cryptosporidium spp. using soil and water asses...
Modelling fate and transport of escherichia coli and cryptosporidium spp. using soil and water assessment tool
quality of drinking water sources is essential as a part of drinking water management. Lately, microbial
organisms originating from faecal contamination have been increasingly identified as a health risk and as an issue for
providing safe drinking water. In Sweden, Lake Mälaren is a drinking water source for two million people. The aim of this
study was to set up, calibrate and validate a hydrological model using the Soil and Water Assessment Tool (SWAT) for
a catchment area draining to Lake Mälaren in order to simulate transport and fate of faecal contaminants in the form of
Escherichia coli and Cryptosporidium spp. oocysts. Furthermore the applicability of using the SWAT model for simulating
transport and fate of faecal contamination in this area will be evaluated. Sources of faecal contamination were identified
through literature studies and contacts with local authorities. Model calibration n was performed on water flow in three
different sub-basins using SWAT-CUP. It showed an Nash-Sutcliffe Efficiency (NSE) between 0.18-0.44 and R2 between
0.26-0.53, whereas validation resulted in an NSE between 0.05-0.1 and R2 between 0.10-0.16. The modelling results
showed that wastewater treatment plants were the dominating source of faecal contamination. Temporary spread of
manure could also be seen as an important contributor. Catchment outlet concentrations of E. coli were higher than
acceptable for Swedish bathing water quality, and the concentration of Cryptosporidium spp. oocysts were in the same
range as reported in other studies.Form Required :
File Size : 531,837 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Hydro-environment
Date Published : 20/08/2015
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