Istared out at the mountains of sand in front of me-the Taklimakan Desert reaching off into the distance. A few camels yowled somewhere nearby. My guide sauntered over, his feet slipping in the unstable sand. "Re...Istared out at the mountains of sand in front of me-the Taklimakan Desert reaching off into the distance. A few camels yowled somewhere nearby. My guide sauntered over, his feet slipping in the unstable sand. "Ready to go?" he said. "展开更多
为了科学评价汉江上游水资源量,提出了一个能够综合反映流域水资源量的指数——AWRI(Aggregate Water Resource Index)。该指数以流域月降水量、蒸发量、平均径流量以及水库平均蓄水量作为输入变量,运用主成分分析法(PCA)分别对每个月...为了科学评价汉江上游水资源量,提出了一个能够综合反映流域水资源量的指数——AWRI(Aggregate Water Resource Index)。该指数以流域月降水量、蒸发量、平均径流量以及水库平均蓄水量作为输入变量,运用主成分分析法(PCA)分别对每个月份系列进行计算,经标准化第一主成分分析计算后即可得到水资源量。在此基础上,对汉江流域上游进行了AWRI计算与分析。分析结果表明:AWRI指数综合考虑了气象、水文、人为因素对水资源量的影响,能够较全面和准确地反映水资源量的年际变化情况,有利于对流域水资源量改变情况进行评估。展开更多
文摘Istared out at the mountains of sand in front of me-the Taklimakan Desert reaching off into the distance. A few camels yowled somewhere nearby. My guide sauntered over, his feet slipping in the unstable sand. "Ready to go?" he said. "
文摘为了科学评价汉江上游水资源量,提出了一个能够综合反映流域水资源量的指数——AWRI(Aggregate Water Resource Index)。该指数以流域月降水量、蒸发量、平均径流量以及水库平均蓄水量作为输入变量,运用主成分分析法(PCA)分别对每个月份系列进行计算,经标准化第一主成分分析计算后即可得到水资源量。在此基础上,对汉江流域上游进行了AWRI计算与分析。分析结果表明:AWRI指数综合考虑了气象、水文、人为因素对水资源量的影响,能够较全面和准确地反映水资源量的年际变化情况,有利于对流域水资源量改变情况进行评估。
