Metadata Name Description
Resource Name: SDL_BASEFLOWS
Title: Sustainable Diversion Limit (SDL) Catchment Baseflows
Anzlic Id: ANZVI0803004936
Custodial Program: Water Division
Custodian: Department of Environment, Land, Water & Planning
Abstract: The Sustainable Diversion Limit (SDL) project focused on developing a means to rapidly estimate the winterfill diversion potential of unregulated and typically ungauged streams. The SDL project divided Victoria into 1,584 catchments, 1,419 of which were not gauged. For the 165 gauged catchments baseflow separation occurred enabling interpretation of streamflow and baseflow specifically for that catchment. For the 1,419 ungauged catchments, each was assigned an indicator gauge as part of the SDL project based on a method that considered hydrological similarity. The hydrological indicators selected to define the streamflow regime in gauged catchments were; base flow index, mean annual flow and median summer flow. The characteristics that were correlated to these hydrological indicators in ungauged catchments were: soil permeability, vegetation cover, stream frequency and annual rainfall. Information generated through the SDL project assisted in the interrogation of the relative magnitude of annual and seasonal baseflows to groundwater use, on an SDL catchment scale.
Search Words: WATER Groundwater, GEOSCIENCES Hydrogeology, WATER Surface
Nominal Input Scale: Not known
Currency Date: 01 February 2018
Dataset Status: Completed
Progress: Complete
Access Constraint: Creative Commons Attribution 4.0 International licence, Copyright and Attribution, Terms of Use - http://creativecommons.org/licenses/by/4.0/
General
Data Existence:
Metadata Name Description
Resource Name: SDL_BASEFLOWS
Title: Sustainable Diversion Limit (SDL) Catchment Baseflows
Anzlic Id: ANZVI0803004936
Custodian: Department of Environment, Land, Water & Planning
Owner: Department of Environment, Land, Water & Planning
Jurisdiction: Victoria
Abstract: The Sustainable Diversion Limit (SDL) project focused on developing a means to rapidly estimate the winterfill diversion potential of unregulated and typically ungauged streams. The SDL project divided Victoria into 1,584 catchments, 1,419 of which were not gauged. For the 165 gauged catchments baseflow separation occurred enabling interpretation of streamflow and baseflow specifically for that catchment. For the 1,419 ungauged catchments, each was assigned an indicator gauge as part of the SDL project based on a method that considered hydrological similarity. The hydrological indicators selected to define the streamflow regime in gauged catchments were; base flow index, mean annual flow and median summer flow. The characteristics that were correlated to these hydrological indicators in ungauged catchments were: soil permeability, vegetation cover, stream frequency and annual rainfall. Information generated through the SDL project assisted in the interrogation of the relative magnitude of annual and seasonal baseflows to groundwater use, on an SDL catchment scale.
Search Words: WATER Groundwater, GEOSCIENCES Hydrogeology, WATER Surface
Purpose:
Geographic Extent Polygon:
Geographic Bounding Box:
-34
141
 
150
-39
Beginning Date: 02AUG2011
Ending Date: 30MAR2012
Maintainence and Update Frequency: As required
Stored Data Format: DIGITAL: ESRI File Geodatabase
Available Format(s) Types: DIGITAL
Lineage: Derived
Positional Accuracy: Not known
Atribute Accuracy: Not known
Logical Consistency: Not known
Data Source: The following information was used to interrogate the impacts of groundwater extraction on streamflows at the SDL catchment scale: Mean annual flow (which was generated for every catchment in the SDL project, using regional prediction equations for the ungauged catchments); Baseflow analyses for the SDL gauges; The final dataset generated contains the following sets of information: *Annual_Use_Baseflow: compares annual groundwater use (where annual groundwater use = x ML/year divided by 365 days) to annual baseflow; *Annual_Ent_Baselfow: as above but with groundwater entitlement; *Annual_Diff_Baseflow: compares (annual groundwater entitlement minus annual groundwater use) to annual baseflow; *Annual_Baseflow_SwFlow: compares annual baseflow to annual surfacewater flow (essentially this is a Baseflow Index); *Use_Summer_Baseflow: compares summer groundwater use (where summer groundwater use = x ML/year divided by 182 days - i.e. double the rate of annual use because most is assumed to occur in summer) to summer baseflow; *Ent_Summer_Baseflow: as above but with groundwater entitlement; *Diff_Summer_Bf: compares (summer groundwater entitlement minus summer groundwater use) to summer baseflow; *Use_Winter_MFT: compares winter groundwater use (where winter groundwater use = x ML/year divided by 123 days - i.e. the duration of the winterfill diversion period during which the MFT applies) to the minimum flow threshold for surface water diversion to undertake winter fill; *Ent_Winter_MFT: as above, but with groundwater entitlement; *Winter_Gw_Sw_Use: compares winter groundwater to surface water use; *Winter_Gw_Sw_Demand_Txt: as above but textual results; Assignment of "indicator gauges" to ungauged catchments so that baseflow information could be attibuted to ungauged catchments; Minimum flow threshold for winter diversions (the daily surface water flow threshold below which winterfill diversion must cease); Surface water diversion per SDL catchment.
Completeness:
Contact Organisation: Department of Environment, Land, Water & Planning
Contact Position: Dataset Data Manager
Address: PO Box 500
East Melbourne   Vic 3002
Australia
Telephone: .
Facsimile: .
Email Address: data.vsdl@delwp.vic.gov.au
Metadata Date: 2013-06-20 00:00:00.0
Additional Metadata:
Resource Name: SDL_BASEFLOWS
Title: Sustainable Diversion Limit (SDL) Catchment Baseflows
Object Name: WATER.SDL_BASEFLOWS
Column Name Column Name 10 Obligation Unique Data Type Reference Table Comments
ANNUAL_BFLOW_SWFLOW O N NUMBER(38,8)
ANNUAL_DIFF_BFLOW O N NUMBER(38,8)
ANNUAL_ENT_BFLOW O N NUMBER(38,8)
ANNUAL_USE_BFLOW O N NUMBER(38,8)
AREA_KM2 AREA_KM2 O N NUMBER(38,8)
BASIN BASIN O N NUMBER(10)
BASIN_NUM_LEVEL O N NUMBER(10)
BASNUM BASNUM O N NUMBER(38,8)
BASNUM_1 BASNUM_1 O N NUMBER(38,8)
DIFF_SUMMER_BF O N NUMBER(38,8)
DOWNSTREAM DOWNSTREAM O N NUMBER(38,8)
ENT_SUMMER_BF O N NUMBER(38,8)
ENT_WINTER_MFT O N NUMBER(38,8)
RIVER_MAJ RIVER_MAJ O N VARCHAR2(50)
RIVER_MIN RIVER_MIN O N VARCHAR2(50)
SDL_CATCH_AREA O N NUMBER(38,8)
SV_BASNUM SV_BASNUM O N NUMBER(4)
SW_USE_WINTER_BASEFLOW O N NUMBER(38,8)
USE_SUMMER_BF O N NUMBER(38,8)
USE_WINTER_MFT O N NUMBER(38,8)
WINTER_GW_SW_DEMAND_TXT WINSWDEM O N VARCHAR2(255)
WINTER_GW_SW_USE WINSWUSE O N NUMBER(38,8)