artificial rainfall
1.Based on artificial rainfall,the courses of sediment yield were studied, at the same time, analyze influence of rainfall intensity, gradient and bulk densities to sediment yield amount.
2.According to the observation data and outcomes of artificial rainfall, based on the overland flow formulas established slope farmland runoff model.
3.The paper establishes a mathematical model for calculating soil erosion modulus and a method for calculating new soil loss by using annual rainfall data and individual rainfall data, taking the outcomes of tests and study of natural rainfall, artificial rainfall and washout as a basis, rainfall erosion force, soil resistance to erosion and ground slope as main factors and combining with the study on new soil loss in typical regional development and construction.
4.The paper analyzes the effect of three cultivation measures of contour cropping, manual excavation and manual hoeing to the reduction of run-off energy and erosion based on office artificial rainfall testing.
5.Study on the Method of Photograph Application of the Rainfall Terminal Speed in the Artificial Simulating Rainfall Equipment
6.Abstract: In accordance with the problems in the system of well storing rainfall at present,based on the experiments of artificial simulating rainfall,and assistance with the measures of natural rainfall,the relationships among the surface runoff yield,silt concentration,catching runoff efficiency and the material of surface,slope gradient,rainfall intensity are analysed systematically.Then,the best slope gradient and material of surface are chosen,in condition of which surface rainfall yield is the largest and silt concentration is the smallest.This is a beneficial study for the practical use of the rainwater catchment plot in furture.
7.Upon using an artificial neural network (ANN) a new short term climate forecast model with the monthly mean rainfall in June in the north of Guangxi as predictand is developed by means of making empirical orthogonal functions (EOF) to the predictors of previous 500hPa height and sea surface temperatures (SSTs), and selecting the high relative principal components.
8.The numerical simulation of ice nucleus seeding shows when the cloud top temperature reached -22℃, i.e, about 10 min after the appearance of first echo, seeding with artificial AgI nucleus in concentration of 5×105 to 107 /m3 in the central part of cloud with a temperature of -2℃ to -6℃ might lead to a slight increase of total rainfall.
