论文部分内容阅读
选取福建省内22个受人类影响和自然条件改变均较小的水文站控制流域,应用3S技术,对各流域的面积、河长、河流平均坡度、形状系数、植被覆盖率、流域平均坡度、平均高程、年均降水量等地理环境要素进行了定量分析;对22个水文站的年最小月流量及多年平均值、变差系数和年极值比进行了统计分析;应用多元回归模型,建立了多年平均年最小月流量与地理环境要素间的关系。研究表明,福建省河流枯水径流量年际变化不大,枯水径流量与流域面积和流域平均坡度显著相关,复相关系数达到0.994;该模型可用于福建省类似条件无资料地区的枯水径流研究。
In this paper, 22 hydrological station controlled basins in Fujian Province, which are both affected by human beings and whose natural conditions have been changed, were selected. The 3S technique was used to analyze the area, length of river, average gradient of river, shape coefficient, vegetation coverage, average slope of the river basin, Average elevation, average annual precipitation and other geographical environmental factors were quantitatively analyzed; annual minimum monthly flow and multi-year average of 22 hydrological stations, coefficient of variation and annual extremum ratio were statistically analyzed; using multiple regression model to establish The relationship between multi-year average minimum monthly flow and geographical elements. The results show that there is not much change in the annual runoff of the rivers in Fujian Province. The runoff of the low water flow is significantly correlated with the basin area and the average slope of the basin, and the complex correlation coefficient reaches 0.994. The model can be used for the low water flow in similar areas in Fujian Province Runoff research.