Phosphorus Loading to Milwaukee Harbor from Rivers, Storm Water, and Wastewater Treatment
| Autor: | Erik R. Christensen, Yonghong Zou |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Hydrology
Biochemical oxygen demand Environmental Engineering biology Phosphorus Stormwater Outfall Environmental engineering chemistry.chemical_element biology.organism_classification Wastewater chemistry Environmental Chemistry Environmental science Cladophora Nonpoint source pollution General Environmental Science Civil and Structural Engineering Total suspended solids |
| Zdroj: | Journal of Environmental Engineering. 138:143-151 |
| ISSN: | 1943-7870 0733-9372 |
| DOI: | 10.1061/(asce)ee.1943-7870.0000464 |
| Popis: | Recent concerns about excessive algal (Cladophora) growth in the nearshore area have prompted a comprehensive study of phosphorus concentrations and loads in the Milwaukee watershed (2000-2008). During this period, total phosphorus (TP) decreased slightly for Outer Harbor water monitoring Station 1 (OH-1) representing the confluence of the three rivers into the Outer Harbor; whereas TP remained the same or slightly increased for Outer Harbor water monitoring Station 2 (OH-2) near the Jones Island Water Reclamation Facility (WRF) outfall. Concentrations of TP at OH-2 (0:095 � 0:005 mg=L) are higher than at OH-1 (0:073 � 0:006 mg=L). Years with high rainfall and river discharge during May through June produce high daily and annual average TP loads. This appears to be caused by resuspension and erosion of sediments containing TP in the river beds. Jones Island WRF contributes 39;500 kg=year or less than 34% of the total load to the Harbor. An estimate of TP load to Lake Michigan from rivers is 76;500 kg=year (65.7%). Stepwise regression results show that total soluble phosphorus (TSP), total suspended solids (TSS), and biochemical oxygen demand (BOD), in that order, are important predictors of TP except for Station OH-2. DOI: 10.1061/(ASCE)EE.1943-7870.0000464. © 2012 American Society of Civil Engineers. CE Database subject headings: Stormwater management; Wastewater management; Water treatment; Watersheds; Rivers and streams; Phosphorus; Nonpoint pollution; Wisconsin. Author keywords: Stormwater; Watershed; Rivers; Phosphorus; Load; Point source and nonpoint source; Regression. |
| Databáze: | OpenAIRE |
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