Table of Values for Specific Yield = Sy
| Area | Sy | Reference | ||
| Folded and fractured shales, siltstones, sandstones | Pennsylvania USA | 0.01 | Risser et al., 2009 | Risser, D.W., Gburek, W.J., Folmar, G.J., (2009), Comparison of Recharge Estimates at a Small Watershed in East-Central Pennsylvania, USA, Hydrogeology Journal, Vol. 17, pp.287-298. |
| Folded and fractured shales, siltstones, sandstones | Pennsylvania USA | 0.0035-0.035 | Risser et al., 2009 | Risser, D.W., Gburek, W.J., Folmar, G.J., (2009), Comparison of Recharge Estimates at a Small Watershed in East-Central Pennsylvania, USA, Hydrogeology Journal, Vol. 17, pp.287-298. |
| Cambrian, precambrian sedimentary basin | Volta Basin, Ghana | 0.01-0.05 | Obubie et al. 2012 | Obuobie, E., Diekkrueger, B., Agyekum, W., Agodzo, S., (2012), Groundwater Level Monitoring and Recharge in the White Volta River Basin of Ghana, Journal of African earth Sciences, Vol. 71-72, pp. 80-86. |
| Hard fractured crystalline rock, granite gneiss basalt | India | 0.0017-0.0015 | Marechal et al., 2003 | Maréchal, J.C., Dewandel, B., Subrahmanyam, K., Torri, R. (2003), Specific Methods for the Evaluation of Hydraulic Properties in Fractured Hard-Rock Aquifers, Current Science, Vol. 85, pp.511-516. |
| Fractured granite | India | 0.014-0.0138 | Marechal et al., 2006 | Maréchal, J.C., Dewandel, B., Ahmed, S., Galeazzi, L., Zaidi, F.K., (2006) Combined Estimation of Specific Yield and Natural Recharge in a Semi-Arid Groundwater Basin with Irrigated Agriculture, Journal of Hydrology, Vol. 329, pp. 281-293. |
| Sand, fine to medium | Illinois, USA | 0.03 | Prickett 1965 | Prickett, T.A., Type-curve solution to Aquifer Tests Under Water-Table Conditions, Ground Water, Vol. 3, pp.5-14. |
| Sand, fine to medium | Illinois, USA | 0.01 | Prickett 1965 | Prickett, T.A., Type-curve solution to Aquifer Tests Under Water-Table Conditions, Ground Water, Vol. 3, pp.5-14. |
| Sand, medium, silty | Illinois, USA | 0.05 | Prickett 1965 | Prickett, T.A., Type-curve solution to Aquifer Tests Under Water-Table Conditions, Ground Water, Vol. 3, pp.5-14. |
| Sand, silty to medium | Illinois, USA | 0.01 | Prickett 1965 | Prickett, T.A., Type-curve solution to Aquifer Tests Under Water-Table Conditions, Ground Water, Vol. 3, pp.5-14. |
| Sand, fine to medium | Illinois, USA | 0.01 | Prickett 1965 | Prickett, T.A., Type-curve solution to Aquifer Tests Under Water-Table Conditions, Ground Water, Vol. 3, pp.5-14. |
| Sand, fine with clay | Illinois, USA | 0.02 | Prickett 1965 | Prickett, T.A., Type-curve solution to Aquifer Tests Under Water-Table Conditions, Ground Water, Vol. 3, pp.5-14. |
| Sand, fine with clay | Illinois, USA | 0.2 | Prickett 1965 | Prickett, T.A., Type-curve solution to Aquifer Tests Under Water-Table Conditions, Ground Water, Vol. 3, pp.5-14. |
| Sand, fine with silt | Illinois, USA | 0.02 | Prickett 1965 | Prickett, T.A., Type-curve solution to Aquifer Tests Under Water-Table Conditions, Ground Water, Vol. 3, pp.5-14. |
| Plinthosols | Zimbabwe | 0.002-0.008 | Sibanda et al., 2009 | Sibanda, T., Nonner, J.C., Uhlenbrook, S., (2009), Comparison of Groundwater Recharge Estimation Methods for the Semi-Arid Nyamandhlovu Area, Zimbabwe, Hydrogeology Journal, Vol. 17, pp. 1427-1441. |
| Plinthosols | Australia | 0.001-0.005 | Cook 2003 | Cook, P.G., A Guide to Regional Groundwater Flow in Fractured Rock Aquifers, SCIRO Land and Water, SA, Australia, 2003. |
| Folded and fractured shales, siltstones, sandstones | Ghana | 0.050-0.080 | Obubie et al. 2012 | Obuobie, E., Diekkrueger, B., Agyekum, W., Agodzo, S., (2012), Groundwater Level Monitoring and Recharge in the White Volta River Basin of Ghana, Journal of African earth Sciences, Vol. 71-72, pp. 80-86. |