Evaluation of non-uniform groundwater level data using spatiotemporal modeling
MetadataShow full item record
Groundwater is one of the main sources of freshwater. To ensure its sustainability, it is important to know its current status and changing pattern over time, through the essential groundwater monitoring program conducted by water management planners, groundwater modelers and urban developers. However, uniformly distributed data is hardly available in most catchments. In this study, the Spatiotemporal Regression Kriging method (Rkriging) was adopted to derive a spatiotemporal pattern for Harvey River Catchment in Western Australia, using the limited groundwater data in the catchment. The accuracy of the estimation was investigated using the Leave-One-Out Cross-Validation approach. Time-series analysis (i.e., auto-correlation and cross-correlation) was then employed to provide a better understanding of the estimated groundwater level change (ΔGWL) over time. To gain insight into the change of groundwater levels, the correlation between groundwater level (GWL) and precipitation pattern with possible time-lag was explored. The results showed that the Rkriging method is satisfactory and the findings were consistent with the previously published results in literature in the area. The estimated decreasing GWL trend matched the precipitation pattern in the catchment. Such shallow groundwater levels in Harvey Catchment resulted in a short time-lag between the precipitation and GWL time-series. The proposed method should be applied to other catchments with limited groundwater data and can be a useful approach for catchments with irregular temporal and spatial data.
Showing items related by title, author, creator and subject.
Basnayaka, Amila Prasad (2012)With the rapid urbanization happening around the world, the nature of the natural hydrological cycle has been changed and it causes many adverse effects like urban flooding, erosion and degradation of water quality in ...
Assessing long-term change in rangeland ecological health using the Western Australian rangeland monitoring systemRussell, Peter John (2007)The rangelands or semi-arid and arid regions of Western Australia occupy about 87 percent of the land area. Pastoral grazing of managed livestock, mainly sheep and cattle, occurs over much of this area, with an increasing ...
Application of geophysical techniques for 3D visualization of regolith hydrogeological architecture and use of this information for management of dryland salinity in Western AustraliaAbbott, Simon (2011)This thesis demonstrates the use of geophysics to identify the hydrogeological structures and mechanisms responsible for the salinisation of land and water in three different case studies. In addition, it demonstrates the ...