Study based on field research and sprout experiment shows ecological effects of base style, illumination depth of water and picking seedling to Potamogeton crispus L.

Calculation of the water depth on a stepped chute spillway based on experimental study;

Remote sensing of water depth in subsidence area based on artificial neural networks;

Computation on streamwise variation of water depth for steady rapidly varied flow in open channel;

By analyzing the use of chart, the estimation of the tide and the depth allowance and the management of crew, the paper makes discussions on the measures for preventing grounding of ships.

Three math models were given for expressing positions of depth points.

This paper combines the hydraulic model and the physical habitat simulation model(PHABSIM) to calculate the instream ecological flow by using the Yellow River carp as target species in Lanzhou to Shizuishan reach of the Yellow River mainstream and taking water depth and velocity into consideration.

Based upon study of the gas flowrate changes of filler under various filling rates,submersion depth,microporous and single orifice aeration ways,different aeration density and other conditions the hydraulics characteristics of HSL aerobic biological fluidized bed is studied,which provide good references for optimization design of HSL aerobic biological fluidized bed and similar reactors.