Database of Lithologic Borelog Data of the Indus Basin, Pakistan

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.

作为南亚可持续发展投资组合的一部分，CSIRO已为巴基斯坦整个印度河流域灌溉系统（IBIS）以及塔尔沙漠东部和乔利斯坦沙漠编译、数字化并地理参考了钻孔岩性日志。这为冲积含水层基底的划定以及主要岩性成分与水力参数典型范围的关联提供了基础（Schmid等，2017）。我们从水电开发局（WAPDA）下属的国际内涝与盐度研究所（IWASRI）提供的来源，以及各类先前研究（WAPDA，1965a、1965b、1980、1981；Hussain和Khan，1974、1975、1978；Sheikh等，1968；Mueller等，1991）中，编译了包含约1500个钻孔及其岩性日志的数据库。这些日志已被扫描、地理参考并编入岩性数据库。数字化日志连同源自SRTM 90米数字高程模型（DEM）的位置和参考高程（CGIAR-CSI GeoPortal，2017）均已纳入该数据库。其目标是纳入尽可能多钻孔的信息，以实现对印度河流域的充分空间覆盖。尽管大多数钻孔位于旁遮普省和信德省的运河控制区，但从一项德国技术合作研究（Mueller等，1991）中，在乔利斯坦沙漠和塔尔帕卡尔区发现了额外的钻孔。这1479个钻孔的岩性日志已作为数据源，用于一份使用钻孔测井软件进行岩性日志水文地质分析的独立报告（Punthakey等，2017）。因此，该岩性日志报告中绘制的岩性日志插图可能存在一定程度的概括性。