TY - JOUR
T1 - Estimation of combined sewer overflow discharge
T2 - a software sensor approach based on local water level measurements
AU - Ahm, Malte
AU - Thorndahl, Søren Liedtke
AU - Nielsen, Jesper Ellerbæk
AU - Rasmussen, Michael Robdrup
PY - 2016
Y1 - 2016
N2 - Combined sewer overflow (CSO) structures are constructed to effectively discharge excess water during heavy rainfall, to protect the urban drainage system from hydraulic overload. Consequently, most CSO structures are not constructed according to basic hydraulic principles for ideal measurement weirs. It can, therefore, be a challenge to quantify the discharges from CSOs. Quantification of CSO discharges are important in relation to the increased environmental awareness of the receiving water bodies. Furthermore, CSO discharge quantification is essential for closing the rainfall-runoff mass-balance in combined sewer catchments. A closed mass-balance is an advantage for calibration of all urban drainage models based on mass-balance principles. This study presents three different software sensor concepts based on local water level sensors, which can be used to estimate CSO discharge volumes from hydraulic complex CSO structures. The three concepts was tested and verified under real practical conditions. All three concepts were accurate when compared to electromagnetic flow measurements.
AB - Combined sewer overflow (CSO) structures are constructed to effectively discharge excess water during heavy rainfall, to protect the urban drainage system from hydraulic overload. Consequently, most CSO structures are not constructed according to basic hydraulic principles for ideal measurement weirs. It can, therefore, be a challenge to quantify the discharges from CSOs. Quantification of CSO discharges are important in relation to the increased environmental awareness of the receiving water bodies. Furthermore, CSO discharge quantification is essential for closing the rainfall-runoff mass-balance in combined sewer catchments. A closed mass-balance is an advantage for calibration of all urban drainage models based on mass-balance principles. This study presents three different software sensor concepts based on local water level sensors, which can be used to estimate CSO discharge volumes from hydraulic complex CSO structures. The three concepts was tested and verified under real practical conditions. All three concepts were accurate when compared to electromagnetic flow measurements.
KW - Combined sewer overflow (CSO)
KW - Computational fluid dynamics (CFD)
KW - Discharge monitoring and quantification
KW - Software sensors
KW - Water level measurements
KW - Combined sewer overflow (CSO)
KW - Computational fluid dynamics (CFD)
KW - Discharge monitoring and quantification
KW - Software sensors
KW - Water level measurements
U2 - 10.2166/wst.2016.361
DO - 10.2166/wst.2016.361
M3 - Journal article
SN - 0273-1223
VL - 74
SP - 2683
EP - 2696
JO - Water Science and Technology
JF - Water Science and Technology
IS - 11
ER -