Waterlogging Susceptibility

Dataset Number1074
Dataset TitleWaterlogging Susceptibility
CustodianData Authority: Department for Environment and Water
Data Provider: Department for Environment and Water

Description

DescriptionWaterlogging occurs when all or part of the soil profile is saturated with water. Some soils are effectively never waterlogged, while others are saturated all the time. The degree to which a soil becomes waterlogged depends on how much water enters the soil and how quickly it leaves, either by deep percolation, lateral seepage or evapotranspiration. Low lying ground is more prone to waterlogging, particularly in high rainfall areas. Higher ground and areas with excessive runoff or little rainfall are unlikely to be significantly affected. The permeability of the soil, depth to watertable, and position in the landscape all affect susceptibility to waterlogging. Soil Landscape Map Units are assessed according to the period of time that all or part of the soil profile is waterlogged. This assessment is an estimate based on observable soil and landscape features, and on opportunistic recordings of soil wetness following rainfall events. Map units typically contain variable waterlogging characteristics. Eight Waterlogging Susceptibility attribute (or 'analysis data') classes have been supplied (see 'W1', 'W2', etc in table below, including not applicable) as percentage (areal extent) values of each Soil Landscape Map Unit. Note: the sum of all percentage values for each map unit totals 100%. This analysis data is to be used for the calculation of spatial data statistics. As a general rule, classes W4 through to W8 are non arable. For map display purposes, Soil Landscape Map Units have been categorised into nine legend categories (WATERLOG), including not applicable, designed to highlight the most limiting or susceptible component(s), provided this accounts for at least 30% of the map unit. Map units with limited occurrences of imperfectly to very poorly drained soils (10 - 30% of area) are shown as an additional legend category. For NatureMaps, the standard legend categories have been simplified to a very minor extent.
UsageLink to Soil Attribute Descriptions. This dataset has been derived from the Soil Landscape Map Units spatial dataset to be used for map creation or the calculation of spatial data statistics. Used to supply Government, community groups, industry and the general public with up to date regional, subregional and catchment level land and soil attribute information for southern South Australia. The aim is to produce maps, statistics and reports displaying and describing: Land and soil attributes within southern South Australia; Land surface features affecting land use, land management and productivity; Limitations / suitability of land and soil for a range of agricultural and other uses. Independent professional advice should be sought before using this in commercial decisions. Further information: soil and land attributes. Waterlogging Susceptibility dataset can be viewed on NatureMaps (>Soils>Soil Moisture Attributes). Spatial data downloads are available from Data SA.

Data Quality

LineageThe dataset is based on an interpretation of 1:40,000 stereo colour aerial photography and limited field inspection of landscapes and soils by soil scientists. Soil Landscape Map Unit boundaries were determined after an integration of field observations and recordings; laboratory analyses; stereoscopic examination of aerial photographs; understanding of regional landscape processes and stratigraphy; existing soil and geological mapping data. To avoid inconsistencies and confusion, any updates to the Soil and Land Attribute mapping are to be managed by DEWNR Soil and Land Program. This data has been released under a Creative Commons licence. Where products are derived from this data, DEWNR are to be acknowledged, and any changes to the original data should be indicated.
CompletenessComplete. The spatial data is subject to amendment as and when more data become available.
Positional AccuracyThe accuracy is to the scale of mapping (50 metres at 1:50,000 and 300 metres at 1:100,000 mapping scale). The spatial data is to be used at the regional, subregional and catchment level, and can be used to provide property overviews; however, cannot be used at the paddock level. South East, Kangaroo Island, Mount Lofty Ranges and the 'bottom' of Yorke Peninsula have been mapped at 1:50,000. Eyre Peninsula, the main part of Yorke Peninsula, Murray Mallee and Northern Agricultural Districts have been mapped at 1:100,000. Map unit boundaries should be treated as transition zones.

Geographic Extent

Extent NameAgricultural Region - South Australia
Min Easting or Longitude132.25
Min Northing or Latitude-38
Max Easting or Longitude141
Max Northing or Latitude-32.25

Dataset Status

Initially Acquired01-JAN-2000
Last Updated01-JUL-2009
Update FrequencyAs required
Maintenance MethodAs required
AusGOALCC BY (Attribution)

Attributes

TableNameField AliasData TypeDescription
Landscape.SALAD_WaterloggingLANSLU CharacterSoil Landscape Map Unit.
Landscape.SALAD_WaterloggingWATERLOG CharacterDRAINAGE / DEGREE OF WATERLOGGING (Legend category. See layer file for descriptions). Map units are classified according to the most susceptible component of the landscape, provided that it accounts for at least 30% of the area. An additional class identifies land where limited areas are susceptible to waterlogging.
Landscape.SALAD_WaterloggingW1 NumberPercentage of map unit which is rapidly to well drained (soil never wet for more than several days).
Landscape.SALAD_WaterloggingW2 NumberPercentage of map unit which is moderately well drained (soil wet for up to one week).
Landscape.SALAD_WaterloggingW3 NumberPercentage of map unit which is imperfectly drained (soil wet for several weeks).
Landscape.SALAD_WaterloggingW4 NumberPercentage of map unit which is imperfectly drained (soil prone to saturation very early in the growing season).
Landscape.SALAD_WaterloggingW5 NumberPercentage of map unit which is poorly drained (soil wet for several months).
Landscape.SALAD_WaterloggingW7 NumberPercentage of map unit which is very poorly drained (soil wet for most of the year).
Landscape.SALAD_WaterloggingW8 NumberPercentage of map unit which is inundated (land permanently under water).
Landscape.SALAD_WaterloggingWX NumberPercentage of map unit which is not applicable.

Contact Information

OrganisationDepartment for Environment and Water
Science Monitoring and Knowledge
Postal AddressGPO Box 1047

ADELAIDE
5001
EmailDEWNR.CustomerServiceCentre@sa.gov.au