兰州市中心城区内涝时空格局和成因分析
李秋萍,李雪梅,龚志远,秦启勇,张博

Spatial and Temporal Pattern and Cause of Waterlogging in the Central Urban Area of Lanzhou
Qiuping LI,Xuemei LI,Zhiyuan GONG,Qiyong QIN,Bo ZHANG
表3 驱动因子分级和地理探测器结果
Table 3 Impact factor grading and geodetector results
指标驱动因子分级q
一级区二级区三级区四级区五级区六级区Y
人口密度/(人/km2)63~1 4611 461~6 8506 850~1 643116 431~26 21226 212~35 59335 593~50 9630.263
路网密度/(km/km2)≤4.424.42~8.838.83~13.2313.23~17.6417.64~22.0622.06~22.640.254
给排水设施距离/m≤697697~1 2201 220~1 7421 742~2 3432 343~3 1753 175~4 9380.212
高程/m1 450~1 4941 494~1 5321 532~1 5801 580~1 6311 631~1 7021 702~1 8700.186
地形起伏度≤33~88~1414~2020~2828~760.097
坡度/°≤3.443.44~7.947.94~14.5514.55~22.2222.22~31.4831.48~67.450.010
NDVI-0.28~-0.18-0.18~-0.01-0.01~0.080.08~0.150.15~0.230.23~0.730.311
不透水面百分比/%0~67~2021~4142~6263~8687~1000.354