AWWA QTC97072

The City of Phoenix, Arizona, is supplied by both surface and groundwater. While some wells pump groundwater directly into municipal water distribution systems, the primary water supply is conveyed by several large, open, surface canals. These two water supplies have very different water chemistry which affects water treatment plant performance and the safety of water supplies. Nitrogen-based fertilizers and naturally occurring arsenic are found in a significant portion of Phoenix's groundwater supplies. The objective of this study was to evaluate the potential health risks of using groundwater to augment surface water supplies. A case study of a water treatment plant located along a canal with several wells is presented. Two types of models were used to simulate the effect of groundwater pumping. The first model is a simple spreadsheet model that assumes steady state well pumpage. The second model is more dynamic and is based upon a river system flow model. This paper presents the results of the spreadsheet modeling and establishes the conceptual framework for dynamic modeling.

Product Details

Published:

01/01/1997

ISBN(s):

0898679583

Number of Pages:

18

File Size:

1 file , 600 KB