Government of the People's Republic of Bangladesh Ministry of ...
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Table 4.9 Summary <strong>of</strong> Aquifer Parameters for <strong>the</strong> Upper Shallow, Lower Shallow and Deep<br />
Aquifers at Faridpur.<br />
Aquifer Upper shallow Lower<br />
shallow<br />
Approx. age (kaBP)<br />
Gradient (m km -1 )<br />
Width (km)<br />
Transmissivity (m 2 d -1 )<br />
Flow (m 3 d -1 5 to 8<br />
8-23<br />
0.08<br />
0.08<br />
18<br />
18<br />
125-1870 40-5020<br />
)<br />
1190<br />
3287<br />
Thickness (m)<br />
45-60<br />
75-90<br />
Porosity (-)<br />
0.10-0.15 0.05-0.20<br />
Time to replace one pore volume (ka)<br />
Source: BGS-DPHE (2001)<br />
12-185<br />
10-321<br />
A-26<br />
Deep<br />
>140<br />
0.08<br />
18<br />
120-1830<br />
6311<br />
90<br />
0.10-0.15<br />
2.3-114<br />
Table 4.10 Estimate <strong>of</strong> Flow Rates and Time for Flushing for a Cross Section Through<br />
Faridpur<br />
a.Block transmissivities (m 2 d -1 )<br />
1<br />
2a<br />
2b<br />
3a<br />
3b<br />
3c<br />
3d<br />
b. Block throughflow rates (m 3 d -1 )<br />
1<br />
2a<br />
2b<br />
3a<br />
3b<br />
3c<br />
3d<br />
Layer Column A Column B Column C Column D<br />
c. Time to replace block volume (a)<br />
1<br />
2a<br />
2b<br />
3a<br />
3b<br />
3c<br />
3d<br />
Source: BGS-DPHE (2001)<br />
1870<br />
1140<br />
780<br />
120<br />
1830<br />
940<br />
1220<br />
598.4<br />
364.8<br />
249.6<br />
38.4<br />
585.6<br />
300.8<br />
390.4<br />
12362<br />
11265<br />
10976<br />
114155<br />
2339<br />
5465<br />
8772<br />
125<br />
920<br />
780<br />
120<br />
1830<br />
940<br />
1220<br />
40<br />
294.4<br />
249.6<br />
38.4<br />
585.6<br />
300.8<br />
390.4<br />
184932<br />
11167<br />
13172<br />
85616<br />
4678<br />
5465<br />
10527<br />
1230<br />
5020<br />
430<br />
1830<br />
940<br />
1400<br />
492<br />
2008<br />
172<br />
585.6<br />
300.8<br />
560<br />
12529<br />
10233<br />
27875<br />
3509<br />
5465<br />
9173<br />
PDF created with FinePrint pdfFactory trial version http://www.fineprint.com<br />
150<br />
240<br />
40<br />
1720<br />
1830<br />
940<br />
1220<br />
60<br />
96<br />
688<br />
585.6<br />
300.8<br />
488<br />
68493<br />
14269<br />
321062<br />
6969<br />
3509<br />
5465<br />
8772
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