南京外秦淮河国家水利风景区位于南京老城西南侧,东起武定门闸下游500米,西至三汉河入长江口,全长约12.2公里,共约3平方公里。景区以外秦淮河为纽带,主要有双孔护镜闸、石头城遗址、中华门城堡、明城墙、古越城遗址、大报恩寺遗址、六朝石刻、清凉山、七桥瓮湿地公园以及沿河亭廊等众多自然或人文景观,集自然山水、生态园林、历史古迹、秦淮画舫、街巷市井、亭台楼阁和民俗民风于一体,极富情趣和魅力。三汉河河口闸是该景区核心工程和主体景观,也是亚洲首座“双孔护镜门”式闸型,造型新颖,雄伟壮观,宛如一道瑰丽的彩虹横跨秦淮河入江口两岸。护镜闸不仅在结构形式、制造工艺等方面有质的超越,而且成为外秦淮河“引江换水、截污清水”工程的重要组成部分,提高了外秦淮河纳污能力,净化了河道水质,改善了南京水环境和城市 The Nanjing Qinhuai River National Water Scenic Area is located on the southwestern side of the old city of Nanjing. It is 500 meters downstream from the Wuding Gate in the east. The Sanhan River flows into the mouth of the Yangtze River in the west with a total length of 12.2 kilometers and a total area of ​​about 3 square kilometers. Qinhuai River outside the scenic area as a link, there are two-hole mirror mirror gate, Stone City ruins, Zhonghua Gate Castle, the Ming City Wall, the ancient city ruins, the Temple Temple, the Six Dynasties stone carvings, Qingliangshan, seven bridges urn wetland park and River Pavilion Gallery and many other natural or cultural landscape, set of natural landscapes, ecological gardens, historical sites, Qinhuai Fang Fang, streets and alleys, pavilions and folk customs in one, very interesting and attractive. Sanyanhe estuary gate is the core of the scenic area and the main landscape, but also Asia’s first “double-hole goggles” Gate type, a new, magnificent, like a magnificent rainbow across the Qinhuai River estuary. Mirror protector not only in the structure of the form, manufacturing processes and other aspects of a qualitative transcendence, and become the Qinhuai River “” into the river water, water and sewage interception "an important part of improving the capacity of the Qinhuai River pollutant, purification The river water quality, improve the Nanjing water environment and the city