水系连通变异下荆南三口河系水文干旱识别与特征分析
代稳, 吕殿青, 李景保, 王金凤, 赵增友

Identification of hydrologic drought characteristics under water system connectivity variation in river system of three outlets of Jingjiang river
Wen DAI, Dianqing LU, Jingbao LI, Jinfeng WANG, Zengyou ZHAO
表3 Copula函数参数及拟合优度评价指标值
Tab. 3 Copula function parameters and values of goodness of fit evaluation index
水文站点 函数类型 参数θ RMSE AIC Bias
新江口 ClaytonCopula 4.7530 0.1495 -103.6713 62.8178
Gumbel-HougaardCopula 0.1840 0.1504 -103.3249 63.2674
FrankCopula 8.3250 0.1562 -101.1413 65.7073
Ali-Mikhail-HaqCopula 361.9520 0.1576 -100.6264 66.2962
沙道观 ClaytonCopula 3.000 0.0425 -176.2557 17.8781
Gumbel-HougaardCopula 0.1610 0.0439 -174.3854 18.4670
FrankCopula 5.4890 0.0434 -175.0464 18.2567
Ali-Mikhail-HaqCopula 999.9990 0.0948 -129.9588 39.8787
弥陀寺 ClaytonCopula 2.245 0.0159 -232.9932 6.6885
Gumbel-HougaardCopula 0.1850 0.0161 -232.2718 6.7726
FrankCopula 3.7490 0.0172 -228.4579 7.2354
Ali-Mikhail-HaqCopula 53.2650 0.1301 -111.6923 54.7280
康家岗 ClaytonCopula 1.9013 0.0249 -207.1084 10.4745
Gumbel-HougaardCopula 0.2020 0.0308 -194.8370 12.9564
FrankCopula 3.7050 0.0324 -191.9145 13.6294
Ali-Mikhail-HaqCopula 999.9990 0.0434 -175.0464 18.2567
管家铺 ClaytonCopula 1.3080 0.0180 -225.8344 7.5719
Gumbel-HougaardCopula 0.1620 0.0196 -220.9201 8.2450
FrankCopula 1.9320 0.0185 -224.2532 7.7822
Ali-Mikhail-HaqCopula 419.3740 0.1351 -109.5160 56.8313