Rationality analysis of field test method for evaluation of geological condition of deposit;

in the paper, following an example of the pebble river bed,the determination of the incipient velocities of nonuniform sands is represented,the effect of the shapes (kurtosis)of pebbles on the incipient velocities is analysed,and then,the field test results on the incipient motion law of nonuniform sands are introduced and compared with those of the theoretical analysis.

Based on the chief drawbacks of present field test methods for hydrodynamic dispersion coefficient, an improvement for the slug injection test in radial flow and a hydrodynamic dispersion test in two-dimen-sional flow are presented.

Based on the field experiment, a theoretical analysis of time-lapse explode method is proposed in the paper.

Based on field experiment,the effects of the seabuckthorn flexible dam on water flow resistance are studied,and the effects of different planting parameters of the seabuckthorn flexible dam on water level and flow velocity in gully channel are discussed.

METHODS According to the principles referring to the drug stability in the CHP and the standard of its quality,we carried out the stress testing,accelerated testing and long-term testing.

Study on long-term experiment of crop rotation and fertilization in the loess plateau Ⅱ. Relationship between soil enzyme activities and soil fertility;