Your search found 8 records
1 Brush, E. G.; Rao, A. R.. 1991. Issues of professional women in agricultural research in developing countries. The Hague, Netherlands: ISNAR. 23p. (Staff notes)
(Location: IWMI-HQ Call no: P 1851 Record No: H08182)
2 Bonta, J. V.; Rao, A. R.. 1992. Estimating peak flows from small agricultural watersheds. Journal of Irrigation and Drainage Engineering, 118(1):122-137.
(Location: IWMI-HQ Call no: PER Record No: H09915)
3 Rao, A. R.; Subrahmanyam, V.; Thayumanavan, S.; Namboodiripad, D. 1994. Seepage effects on sand-bed channels. Journal of Irrigation and Drainage Engineering, 120(1):60-79.
(Location: IWMI-HQ Call no: PER Record No: H013878)
Experiments were conducted to find the effects of seepage on flow over a sand bed in a straight rectangular flume under two conditions: (1) When the channel bed is plane, horizontal, and nontransporting; and (2) when the bed is transporting at a constant sediment concentration. Effects of both injection and suction, caused by seepage flow into and out of the channel bed, are studied for condition 1: and only suction effects are studied for condition 2. Three sands, of sizes 0.34 mm, 0.53 mm, and 0.80 mm, are used in the study. It is found that seepage can cause an increase or decrease in the bed shear stress relative to no seepage for the two conditions. The change in bed shear stress depends on the relative magnitudes of the bed shear stress and the critical shear stress of particles under the no-seepage condition, sediment concentration, and the seepage rate. Quantitative relationships giving the ratio of bed shear stress with and without seepage are presented for both conditions of the bed. A procedure to estimate the changes in bed shear stress, friction factor, Manning's n, and stream power due to seepage for known initial conditions of the channel and the amount of applied seepage is presented.
4 Bonta, J. V.; Rao, A. R.. 1994. Seasonal distributions of peak flows from small agricultural watersheds. Journal of Irrigation and Drainage Engineering, 120(2):422-439.
(Location: IWMI-HQ Call no: PER Record No: H014100)
5 Rao, A. R.; Voeller, T. L. 1997. Development and testing of drought indicators. Water Resources Management, 11(2):119-136.
(Location: IWMI-HQ Call no: PER Record No: H020810)
6 Rao, A. R.; Sitaram, N. 1999. Stability and mobility of sand-bed channels affected by seepage. Journal of Irrigation and Drainage Engineering, 125(6):370-379.
(Location: IWMI-HQ Call no: PER Record No: H026031)
7 Chang, F. J.; Delleur, J. W.; Rao, A. R.. 1991. Sensitivity analysis of the surface water acidification model ILWAS in the saturated and unsaturated zone. In Nachtnebel, H. P.; Kovar, K. Hydrological basis of ecologically sound management of soil and groundwater. Wallingford, UK: IAHS. pp.23-31.
Mathematical models ; Simulation models ; Sensitivity analysis ; Surface water ; Water quality ; Watersheds ; Water balance
(Location: IWMI-HQ Call no: 551.48 G000 NAC Record No: H029743)
8 Rao, A. R.; Padmanabhan, G. 1984. Analysis and modeling of Palmer’s drought index series. Journal of Hydrology, 68:211-229.
(Location: IWMI-HQ Call no: P 6603 Record No: H033215)
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