Premium
STATISTICAL ANALYSIS OF THE IMPACT OF GROUND WATER PUMPAGE ON LOW‐FLOW HYDROLOGY 1
Author(s) -
Fetter C. W.
Publication year - 1977
Publication title -
jawra journal of the american water resources association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.957
H-Index - 105
eISSN - 1752-1688
pISSN - 1093-474X
DOI - 10.1111/j.1752-1688.1977.tb02026.x
Subject(s) - baseflow , streamflow , hydrology (agriculture) , drainage basin , environmental science , groundwater , aquifer , structural basin , effluent , discharge , wastewater , geology , geography , geomorphology , environmental engineering , cartography , geotechnical engineering
Ground‐water pumpage withdrew 57 cubic feet per second from aquifers beneath the Yahara River Basin in 1970. Forty‐six cubic feet per second were exported by the diversion of treated wastewater from the drainage basin. The low‐flow hydrology of the upper Yahara River has been impacted by this diversion. Prior to 1959, the wastewater was discharged into the river, augmenting the baseflow during low‐flow periods. As much as 85% of streamflow was due to effluent discharge. In 1959 the wastewater was transferred from the river basin. The result was a decrease of about one‐third in mean annual streamflow, and a decrease of more than 50% in the 7Q 2 and 7Q 10 . Regression analysis showed the annual 7‐day low‐flow and 60‐day low‐flow have a statistically significant correlation with mean annual flow. Using predictions of future mean annual discharge of the river with increasing interbasin transfers, it is shown that by 1990 there is a significant probability that in some years the 60‐day low‐flow in the river will be zero.