Upscaling of transmissivity,derived from specific capacity: a hydrogeomorphological approach applied to the Doon Valley aquifer system in India |
| |
| Authors: | S K Srivastav M W Lubczynski A K Biyani |
| |
| Institution: | (1) Indian Institute of Remote Sensing (National Remote Sensing Agency), 4, Kalidas Road, Dehra Dun, 248 001, India;(2) International Institute for Geoinformation Science and Earth Observation (ITC), Hengelosestraat 99, P.O. Box, 67500 AA Enschede, The Netherlands;(3) DBS (PG) College, Dehra Dun, 248 001, India |
| |
| Abstract: | Transmissivity (T) is one of the most important parameters in groundwater studies, and is generally estimated from pumping tests. T can also be deduced from abundantly available specific-capacity (Q/s) data by using analytical and/or empirical approaches, further upscaled by geostatistical methods. A different, remote sensing based, hydrogeomorphological approach is proposed, to upscale T from point- or well-scale to aquifer-scale, and it is applied to the piedmont alluvial aquifer system of Doon Valley in India. In the first step, Q/s and T data-pairs available from aquifer tests were used to establish an empirical, logarithmic relation. Subsequently, satellite imagery along with available data from published and unpublished maps, literature sources and ground surveys were used to divide the aquifer system into major hydrogeomorphological domains that control the groundwater occurrence and flow. Then, the T data derived from Q/s (using the empirical relation) and that available from pumping tests at well-scale were upscaled to aquifer-scale by averaging the T values within each hydrogeomorphological domain. Such a stratification approach is especially useful in areas where availability of only a few data-pairs of known Q/s and T limit the use of geostatistical techniques. A comparative study of the published empirical relations between Q/s and T in various hydrogeologic settings revealed that the relation obtained for Doon Valley aquifer system is close to that found for a similar alluvial aquifer system in Morocco. |
| |
| Keywords: | Hydraulic properties Specific capacity Transmissivity Unconsolidated sediments India |
| 本文献已被 SpringerLink 等数据库收录！ |
|
