Hydraulic structures: research needs

The aim of Hydraulics Research is to continue its policy of carrying out research that meets the most urgent needs of the civil engineering industry. In order to discover how industry sees its needs at the present time a questionnaire was circulated to organisations representing consultants, water and local authorities. On the basis of the replies that were received, six topics justifying further research have been identified and outline research proposals have been put forward. The six topics are: (i) preparation of a design guide for non-standard flow measuring structures; (ii) preparation of an illustrated manual of roughness values for UK rivers; (iii) preparation of a design guide for energy dissipators for small structures and research on protection measures downstream from dissipators; (iv) research on tide flaps for circular pipes; (v) research on drowned venturi sluices; (vi) research on various aspects of sediment removal devices