OLR(l986)33(12) D. Submarine Geology and Geophysics 1011

waves. Tropic Oceanol., 4(2):38-43. (In Chinese, English abstract.) Inst. of Acoustics, Acad. Sin., People’s Republic of China.

D60. Geomorphology (fans, canyons, etc.)

86~6900 Bellaiche, Gilbert, Vincent Coutellier and Laurence

Droz, 1986. Seismic evidence of widespread mass transport deposits in the Rh8ne deep-sea fan: their role in the fan construction. Mar. Geol., 71(3-4):327-340.

In the Rhone deep-sea fan mass transport deposits are represented either by transparent or by chaotic echo-facies. They cover a very large area of this fan both superficially and interbedded in the sedimen- tary column. These deposits played an important role in fan construction by blocking the paths of detrital feeding and leading to the creation of new ones. Lab. de Geodynam. Sous-Mar., UA CNRS No. 718, 06230 Villefranche-sur-mer, France.

D70. Coasts, beaches, marshes

86:6!Ml Hansom, J.D., 1986. Intertidal forms produced by

floating ice in Vestfirdir, Iceland. Mar. Geol., 71(3-4):289-298. Dept. of Geogr., Univ. of Sheffield, SlO 2TN, UK.

86:6!MJ2 Kamphuis, J.W., M.H. Davies, R.B. Naim and O.J.

Sayao, 1986. Calculation of littoral sand transport rate. Coast. Engng, Amst., lO(l):l-21. Dept. of Civ. Engng., Queen’s Univ., Kingston, ON K7L 3N6, Canada.

86:6903 Mallik, T.K., 1986. Micromorphology of some placer

minerals from Kerala Beach, Iudh. Mar. Geol., 71(3-4):371-381. Offshore Mineral Exploration and Marine Geol. Div., Geol. Surv. of India, 4 Chowringhee Lane, Calcutta 700 016, India.

XX6904 Nielsen, Peter, 1986. Suspended sediment concen-

tratious under waves. Coast. Engng, Amst., lo(l): 23-31.

A predictive formula is derived for calculation of the magnitude of time-averaged suspended sediment concentrations under waves. By taking into account the effect of flow contraction near ripple crests, the

formula applies equally well for rippled beds and sheet flow conditions. Coastal Engng. Br., NSW Dept. of Public Works, 140 Phillip St., Sydney, NSW 2000, Australia.

Pizzuto, J.E., 1986. Barrier island migration and onshore sediment transport, southwestern Del- aware Bay, Delaware, U.S.A. Mar. Geol., 71(3- 4):299-325. Dept. of Geol., Univ. of Delaware, Newark, DE 19716, USA.

86:6906 Sternberg, R.W., D.A. Cacchione, D.E. Drake and

Kate Kranck, 1986. Suspended sediment trans- port in an estuarine tidal channel within San Francisco Bay, California. Mar. Geol., 71(3- 4):237-258. Sch. of Oceanogr., Univ. of Wash- ington, Seattle, WA 98195, USA.

a6907 Van Rijn, L.C. and G.L. Tan, 1985. Two-dimen-

sional vertical mathematical model for sedimen- tation in dredged channels and trenches by currents and waves. ‘SUTRENCH-model.’ RijkswatSt. Communs, 4 1: 63pp.

A detailed description of the SUTRENCH model that includes parameters for flow velocity profiles, fluid and sediment mixing coefficients, boundary conditions, and bed level changes is presented. In addition the flow field in a channel oblique to the flow and the effects of important hydraulic param- eters on sedimentation rates are discussed. The model was verified in field studies in the Netherlands (2 sites) and Korea. Delft Hydraulics Lab., Delft, Netherlands. (msg)

DIM. Reefs and atolls

Herman, M.E., R.W. Buddemeier and S.W. Wheat- craft, 1986. A layered aquifer model of atoll island hydrology: validation of a computer simulation. J. Hydrof., 84(3-4):303-322.

The finite-element hydrological model FEM- WATER was used to simulate groundwater move- ment in an atoll island vertical section and found to be in excellent agreement with measured values taken from wells on Enewetak Atoll, confirming the layered aquifer model’s validity as well as its hydraulic conductivities. Results emphasize the importance of tidal effects and vertical movement, casting doubt on classic models which assume essentially horizontal flow. U.S. EPA, BWM-DW, 999 18th St., Denver, CO 80202, USA. (fcs)