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1概况1.1自然地理概况玉带河发源于陕西省汉中市宁强县境内,流域位于米仓山北麓,汉江河谷盆地以南,为汉江源头右岸第一条较大支流。该河贯穿宁强全县于大安镇汇入汉江。河长101km,流域面积831km2,河道平均比降7.8‰。流域内有“引嘉(嘉陵江)入汉(汉江)”跨流域引水工程一座。玉带河流域内为土石山区,植被较好,森林覆盖率较高。其中,高山区森林覆盖好,低山丘陵区出露大面积花岗岩体,风化剥蚀作用强烈;山谷段山高谷深,坡陡流急,河道比降大,汇流速度快,
1 Overview 1.1 Physical Geography Jade River originates in Ningqiang County, Hanzhong City, Shaanxi Province, the basin is located in the northern foot of Micangshan, south of the Han River valley, the first of the larger tributaries of the right bank of the source of the Han River. The river runs through Ningqiang county in Daan town into the Han River. The river is 101km long, with an area of 831km2 and an average ratio of 7.8 ‰ in the river. Within the catchment there is a “Cijia (Jialing River) into the Han (Han River)” inter-basin diversion project. Jade belt for the rocky mountainous areas, vegetation is better, higher forest coverage. Among them, the high mountainous area has a good coverage of forests, and large-scale granite bodies are exposed in the hilly areas, with strong weathering and denudation. The valley valleys are deep and steep,