江苏科技信息
江囌科技信息
강소과기신식
JIANGSU SCIENCE & TECHNOLOGY INFORMATION
2015年
21期
75-78
,共4页
地表植被%地表径流%水土保持
地錶植被%地錶徑流%水土保持
지표식피%지표경류%수토보지
ground vegetation%soil pores surface runoff%soil and water conservation
地表植被与土壤大孔隙均为影响地表径流的重要因素，植被能够降低径流速度和流量，将对侵蚀程度有很大影响；大孔隙的存在，提高了降雨进入土壤的入渗率，而进入土壤中的水就绕过大部分土壤基质，加快了地下水的响应速度，地下水在土壤水还未达到田间持水量时就得到补充，改变了地表径流分配，对地表径流流速、流量均起到了抑制作用。文章采用室内土槽实验的方法人造大孔隙，在地表种植植被，通过人工降雨，从地表径流流量、流速及壤中流、地下水产生方式分析地表植被与土壤大孔隙对地表径流的影响程度，进一步认识地表植被及土壤大孔隙对水土保持的作用。
地錶植被與土壤大孔隙均為影響地錶徑流的重要因素，植被能夠降低徑流速度和流量，將對侵蝕程度有很大影響；大孔隙的存在，提高瞭降雨進入土壤的入滲率，而進入土壤中的水就繞過大部分土壤基質，加快瞭地下水的響應速度，地下水在土壤水還未達到田間持水量時就得到補充，改變瞭地錶徑流分配，對地錶徑流流速、流量均起到瞭抑製作用。文章採用室內土槽實驗的方法人造大孔隙，在地錶種植植被，通過人工降雨，從地錶徑流流量、流速及壤中流、地下水產生方式分析地錶植被與土壤大孔隙對地錶徑流的影響程度，進一步認識地錶植被及土壤大孔隙對水土保持的作用。
지표식피여토양대공극균위영향지표경류적중요인소，식피능구강저경류속도화류량，장대침식정도유흔대영향；대공극적존재，제고료강우진입토양적입삼솔，이진입토양중적수취요과대부분토양기질，가쾌료지하수적향응속도，지하수재토양수환미체도전간지수량시취득도보충，개변료지표경류분배，대지표경류류속、류량균기도료억제작용。문장채용실내토조실험적방법인조대공극，재지표충식식피，통과인공강우，종지표경류류량、류속급양중류、지하수산생방식분석지표식피여토양대공극대지표경류적영향정도，진일보인식지표식피급토양대공극대수토보지적작용。
There are two important factors to impact surface runoff. One is ground vegetation,another is soil pores. Vegetation can reduce the speed and flow of runoff,which make a strong impact to erodibility. The existence of soil pores improves the infiltration rate of the rainfall. The rain which enters into the soil bypasses most of the soil matrix and speeds up the response speed of groundwater. Groundwater was added before soil water has not yet reached to the field capacity. Thereby distribution of surface runoff was changed and velocity and flow of the surface runoff were both controlled. In this paper,we did the experiment of indoor soil box: made soil pores,artificial rainfall and planted vegetation on the surface. We analyzed the impact of ground vegetation and soil pores to surface runoff according to velocity,flow,subsurface flow and ground water formation. Then we get a further understanding that surface vegetation and soil pores play an important role in soil and water conservation.
