| Description |
As part of the South Asia Sustainable Development Investment Portfolio, CSIRO has compiled, digitized, and georeferenced the borelog lithology for all of the Indus Basin Irrigation System (IBIS) of Pakistan as well as eastern Thar and Cholistan deserts. This was the basis for the delineation of the base of the alluvial aquifer and the association of major lithologic component with typical ranges of hydraulic parameters (Schmid et al, 2017). We compiled a database of about 1500 bores with borelogs from sources provided by the International Waterlogging and Salinity Research Institute (IWASRI) of the Water and Power Development Authority (WAPDA), and from various previous studies (WAPDA, 1965a, 1965b, 1980, 1981; Hussain and Khan, 1974, 1975, 1978; Sheikh et al, 1968; Mueller et al, 1991). These logs were scanned, geo-referenced and compiled in a lithology database. The digitised logs along with locations and reference elevations derived from a SRTM 90m digital elevation model (DEM) (CGIAR-CSI GeoPortal, 2017) were included in the database. The aim was to include information from as many bores as possible in order to have adequate spatial coverage of the Indus Basin. While most bores are located in the canal command areas in Punjab and Sindh, additional bores were found in the Cholistan desert and in Tharparkar district from a German technical cooperation study (Mueller et al, 1991). The borelogs for these 1479 bores have been used as data source in a separate report for hydrogeological analysis of borelogs (Punthakey et al., 2017) using borehole and well logging software. As a result, the plotted borelog illustrations in the borelog report may be somewhat generalized.
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