Figure 2

Network of the water supply system of middle and lower Han River basin: (a) water-intakes in middle and lower Han River basin [(a) is generated by ArcGIS10.2 software. URL link: http://www.arcgisonline.cn/]; and (b) schematic diagram of middle and lower Han River basin [(b) is generated by Microsoft Powerpoint 2013 software. URL link: https://www.microsoft.com/zh-cn/download/details.aspx?id=55145]. Note: WTP1 refers to Han-Wei Water Transfer Project, WTP2 refers to South-North Water Transfer Project, WTP3 refers to North Hubei Water Transfer Project and WTP4 refers to Yangtze-Han Water Transfer Project; The numbers refer to the water-intake, U1 (Gu-cheng-nan-he), U2 (Shang-you-yin-ti-shui), U3 (Man-he), U4 (Xian-ju-he), U5 (Jing-zhong-you), U6 (Jing-zhong-zuo), U7 (Sha-yang-yin-han), U8 (Tian-men-yin-han), U9 (Xing-long), U10 (Xie-wan), U11 (Dong-jing-he), U12 (Ze-kou), U13 (Chen-hu), U14 (Han-chuan-er-zhan), U15 (Jiang-wei-ti-shui).