Improving Rainwater Harvesting Efficiency Of Loess Soil With Organic Silicon Materials

Rainwater catchments system engineering is an important way to develop agriculture,reduce erosion of soil, improve environment and increase incoming of farmers. In rainwater catchments system engineering, the key technology is to search for materialswith loess to promote efficiency of rainwater catchments. The paper put forward the design of mixing new-type macromolecule organic siliconmaterials with loess to promote the efficiency of rainwater catchments. Three organic siliconmaterials were selected by some simple experiments. Spraying the materials, a polymercompacted slope surface, to form a uniform hydrophobic film, can reduce soil infiltration andincrease runoff, thus to improve rainwater harvest efficiency. Through the indoor, outdoorrain-simulated, natural rainfall and with crop in the field experiments, it is discussed about theeffect of new-type macromolecule organic silicon on the capability, efficiency of loess catchmentsmaterials. The results of experiments indicated that: 1,The most appropriate ratio of silicon 1 and water is 1/7~1/5, ratio of silicon 2 and water is1/5, ratio of silicon 3 and water is 1/5. The feasible quantity of the macromolecule organic silicon1 is 100~150ml per square meter; the one of silicon 2 is 100 ml, the one of silicon 3 is 50ml. Theprice is about 1~3 yuan. 2,Under rain-simulated ,the most appropriate ratio silicon and water, the feasible quantity ofsilicon, 1.0~1.3mm/min of the intensity, 17% of the previous soil water content, 1.5g/cm3 of thedry bulk density and 15 ° of the slope, the mixing new-type macromolecule organic silicon withloess rainwater catchments materials have the satisfying rainwater catchments efficiency morethan 70%, it is 2 ~3 times that of the efficiency of loess without the macromolecule organic silicon,the capacity of erosion about the new-type mixing material is 1/5 that of the control, the silicon 1is better for light clay. 3,In Inner Mongolia, under natural rainfall, the average efficiency of loess with three siliconwas 38%,50%,38% in half year. Based on comparative analysis, the silicon 2 is more appropriatefor Inner Mongolian soil. Moreover, the efficiency of High Strength and Water Stability EarthConsolidator with silicon was higher than that of loess with silicon. 4,Spraying the materials of silicon, a polymer compacted slope surface, improved rainwaterharvest efficiency. It is good for crop in the period of crop growth. The water quantity of rainfallcatchments of loess with organic silicon was about 2~3 times that of loess without silicon in the 3m2 from August to November. The annual growth corn of loess with organic silicon was 1.5 timesthat of loess without silicon. From what I have mentioned above, we can see clearly that the rainwater catchments patternof loess with organic is a convenient way with higher efficiency and low price, it is a brighterfuture in the rainwater catchments engineering. However, we should study the life span about thematerial and craftwork of management and conservation, study the most appropriate ratio ofsilicon and water and the most feasible quantity of the macromolecule organic silicon when it isused in different soil.