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为了给贵州喀斯特山区降雨资源化、抗御季节性干旱等生态问题的解决提供科学依据,于2001年6月—2003年7月在贵州省修文县设置了3个不同坡度(6.5°,9.5°,16°)和3种不同土地利用方式(玉-麦、菜-菜和裸地)的径流观测试验,采集地表径流量,研究了作物种植对降雨资源化的影响。结果表明,坡地黄壤径流系数大,径流与产流降雨量间呈Rs=-a+bp2+dp3的数量关系;坡地黄壤降雨资源量与产流降雨间呈Pe=a+bP+cP2-dP3的数量关系。作物种植减弱了地表径流,增加了坡地对降雨的入渗与截留量,具有降低单次径流差异、稳定径流变异的作用,提高了降雨资源化水平。
In order to provide a scientific basis for solving the problems of rainwater resource utilization and the resistance to seasonal drought in Guizhou Karst mountains, three different slopes (6.5 °, 9.5 °, 6.5 °) were set up in Xiuwen County, Guizhou Province from June 2001 to July 2003, 16 °) and three different land use patterns (jade-wheat, vegetable-vegetable and bare land). The surface runoff was collected and the effects of crop planting on rainfall resource utilization were studied. The results showed that the runoff coefficient of the yellow soil in the slope was large and the relationship between runoff and runoff was Rs = -a + bp2 + dp3. The amount of precipitation and precipitation rainfall in slope yellow soil was Pe = a + bP + cP2-dP3 Number of relations. Crop planting weakened surface runoff and increased infiltration and interception of rainfall on sloping land, which reduced the difference of single runoff and stabilized runoff variation, and increased the level of rainfall resources.