River Runs Through It. Evaluation of Groundwater
RIVER RUNS THROUGH IT. EVALUATION OF GROUNDWATER AND SURFACE WATER CONNECTIVITY AND ITS IMPLICATION ON RIPARIAN BIOGEOCHEMISTRY AND ECOLOGY Paul Julian II1, Greg Fletcher 2 and Alan Wright1 1University of Florida, Soil and Water Sciences, Ft. Pierce, FL, USA 2Wimmera Catchment Management Authority, Horsham, Victoria, AUS 1 Introduction 2 Material and Methods Data sources • As flow enters riverine floodplains it carries with it sediment, organic • Hydrologic data were queried from the Victoria State Government Department of Environment, Land, matter and nutrients from upstream water bodies stimulating microbial Water and Planning (DELWP) water measurement information system (WMIS; communities and biogeochemical cycling. http://data.water.vic.gov.au). • Rainfall data were queried from the Australian Government Bureau of Meteorology (BoM) • Landscape scale factors can also influence riverine water balance environmental information explorer (http://www.bom.gov.au/jsp/eiexplorer/). through changes in rainfall-runoff relationships and groundwater • Grab and in-situ water quality data were retrieved from the DELWP WMIS interaction. • Additional water quality data and macroinvertebrate data were provided by the Environmental Protection Authority Victoria. • Land clearing and intensive irrigation can affect the groundwater Data Analysis elevation (i.e. subsurface saline aquifer) allowing high salinity • Annual discharge volumes were calculated for each discharge monitoring locations based on the EPA groundwater to seep into the river affecting the ecosystems integrity. Victoria water year (June 1st – May 30th). • Annual rainfall totals were also computed by water year. • Drought severity was assessed between WY1920 and 2016 using the standardized rainfall Scan me for more information anomaly (SRA; Asfaw et al. 2018) index where total annual rainfall (P ) are related to the mean Objectives r and web content: and standard deviation (Pm and , respectively) observed across the entire.
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