Late dry season stream flows and groundwater levels, upper Roper River, October 2013
Details:
Title
Late dry season stream flows and groundwater levels, upper Roper River, October 2013,
Creator
Wagenaar, Daniel,
Tickell, Steven,
Northern Territory. Department of Land Resource Management,
Collection
E-Publications,
E-Books,
PublicationNT,
Technical Report No 10/2013,
Date
2013-10-01,
Description
A set of stream gaugings and water quality measurements were made along the upper reaches of the Roper River in late October 2013. At that time of year all of the stream flow is baseflow derived from the Tindall aquifer of the Daly Basin. The river progressively gained in flow as it passed over the aquifer and reached a maximum flow of 5.4 cumecs at the margin of the basin. The rates of groundwater inflow along the various sections of the river have been identified as well as one downstream section that loses a small amount of water to the aquifer. Baseflows are currently near record high levels, reflecting a trend of higher than average rainfall since the mid-1970's.
Groundwater levels are slightly lower than those measured in early November of 2012 but on the scale of the last ten years they remain relatively high.
Field water quality variations reflect several sources of groundwater with differing salinities. Biological as well as physical processes in the river also affect its chemistry.,
Notes
Date:2013-10,
Made available via the Publications (Legal Deposit) Act 2004 (NT),
Language
English,
Subject
Northern Territory,
Hydrogeology,
Groundwater -- Northern Territory -- Top End Region,
Hydrogeology -- Northern Territory -- Top End Region,
Stream measurements -- Northern Territory -- Top End Region,
Stream measurements,
Water quality -- Northern Territory -- Top End Region,
Groundwater,
Top End Region,
Water quality,