First flush effects in an urban catchment area in Aalborg

1998 ◽  
Vol 37 (1) ◽  
Keyword(s):  
Catchment Area ◽  
First Flush ◽  
Urban Catchment

First flush effects in an urban catchment area in Aalborg

1998 ◽  
Vol 37 (1) ◽  
pp. 251-257 ◽  
Author(s):  
Torben Larsen ◽  
Kirsten Broch ◽  
Margit Riis Andersen
Keyword(s):  
Water Quality ◽  
Catchment Area ◽  
Quality Parameters ◽  
Average Concentration ◽  
First Flush ◽  
Storm Events ◽  
Urban Catchment ◽  
Discharge Measurements ◽  
Quality Measurements

The paper describes the results of measurements from a 2 year period on a 95 hectare urban catchment in Aalborg, Denmark. The results of the rain/discharge measurements include 160 storm events corresponding to an accumulated rain depth of totally 753 mm. The water quality measurements include 15 events with time series of concentration of SS, COD, BOD, total nitrogen and total phosphorus. The quality parameters showed significant first flush effects. The paper discusses whether either the event average concentration or the accumulated event mass is the most appropriate way to characterize the quality of the outflow.

Present Condition Analysis and Design of Sewer Collector Recovery

2020 ◽  
Vol 15 (3) ◽  
pp. 184-195
Author(s):  
Réka Csicsaiová ◽  
Ivana Marko ◽  
Jaroslav Hrudka ◽  
Ivona Škultétyová ◽  
Štefan Stanko
Keyword(s):  
Catchment Area ◽  
Present Condition ◽  
Urban Catchment ◽  
Analysis And Design ◽  
Current State ◽  
Sewer Network

The aim of the study is to assess the hydraulic capacity of the sewer network and sewer collector recovery in the urban catchment area of Trnava.The analysis focuses on the evaluation of situations with different precipitation frequencies. Elaboration consists of modeling the current state of the assessed sewer collector B and subsequent loading of this collector by several block rainfalls. Based on the results of the analysis, the recovery of the sewer network proposed.

scholarly journals First flush of storm runoff pollution from an urban catchment in China

2007 ◽  
Vol 19 (3) ◽  
pp. 295-299 ◽  
Author(s):  
Li-qing LI ◽  
Cheng-qing YIN ◽  
Qing-ci HE ◽  
Ling-li KONG
Keyword(s):  
Storm Runoff ◽  
First Flush ◽  
Urban Catchment ◽  
Runoff Pollution

Interrelationship among the pollutants in stormwater in an urban catchment and first flush identification using UV spectroscopy

Chemosphere ◽  
2019 ◽  
Vol 233 ◽  
pp. 245-251 ◽  
Author(s):  
Dinushika Ekanayake ◽  
Rupak Aryal ◽  
Md Abu Hasan Johir ◽  
Paripurnanda Loganathan ◽  
Craig Bush ◽  
...  
Keyword(s):  
Uv Spectroscopy ◽  
First Flush ◽  
Urban Catchment

Ethnic origins of patients attending specialist eating disorders services in a multiethnic urban catchment area in the United Kingdom

2009 ◽  
Vol 42 (5) ◽  
pp. 459-463 ◽  
Author(s):  
Glenn Waller ◽  
Ulrike Schmidt ◽  
Janet Treasure ◽  
Francesca Emanuelli ◽  
Joana Alenya ◽  
...  
Keyword(s):  
Eating Disorders ◽  
United Kingdom ◽  
Catchment Area ◽  
Urban Catchment ◽  
The United Kingdom ◽  
Ethnic Origins

First flush of dissolved compounds

1999 ◽  
Vol 39 (9) ◽  
pp. 55-62 ◽  
Author(s):  
Peter Krebs ◽  
Peter Holzer ◽  
Jacco L. Huisman ◽  
Wolfgang Rauch
Keyword(s):  
Flow Rate ◽  
Catchment Area ◽  
Treatment Plant ◽  
First Flush ◽  
Conceptual Approach ◽  
Sewer System ◽  
Wave Celerity ◽  
Combined Sewer ◽  
Downstream Section ◽  
Hydrodynamic Effects

In a crude conceptual approach it is commonly assumed that in a combined sewer system the concentration of dissolved compounds in diluted by an increasing flow rate due to rainwater inflow. However, theory of hydraulics suggests that these compounds are influenced by hydrodynamic effects. It is known that since the wave celerity is higher than the flow velocity of the water, the increase of flow rate induced through rain runoff is recognised earlier at a certain downstream section of the combined sewer than the concentration increase of typical rain-water compounds originating from surface wash-off. This description implies that the wave front is formed from the fluid that was present in the sewer before the flow rate increased, that is the sewage! By means of measurements and numerical simulations, it is shown that this effect may cause a significant impact of dissolved compounds on the receiving water, when a combined sewer overflow occurs, and also on the wastewater treatment plant when the sewer network is flat and catchment area is big.

Sign in / Sign up

Export Citation Format

Share Document