The main tributary of Zhanghe River

Dongyadi River, a first-class tributary of Qingzhang River, originates from the West Lion Cup in Shu Qi Village, Huangyadong Town, Licheng side of the watershed in Licheng and Wuxiang counties, flows southeast through Shuizhai and Dongyadi Village, and joins Qingzhang River to the east of Kanhou Village. The total length of the river is 19 km, the average longitudinal slope is about 24‰, the drainage area is 1 18.7 km2, the riverbed is sandy pebble, and the riverbed roughness is about 0.067. To the south of the main stream of Dongyadi River, there is a large tributary, Huangyadong River, which originates from the famous Huangyadong area, flows through villages such as Huangyadong, Chiyu and Shanghe, and joins Dongyadi River to the south of Dongyadi Village, with a length of 1 1 km. Dongyadi River is a seasonal river, which usually dries up. During the flood season, floods are accompanied by rainfall, and come and go quickly. The annual runoff of this river is120,000 cubic meters. River sediment is mainly bed load.

Zhuangyuan River is a first-class tributary of Qingzhang River. Originated in Xijing Town in the north of Licheng County, it has two branches, the north branch is in the west of Xingshutan Village and the south branch is in Qiantuo Village. The two sources are 3 kilometers apart. They flow from west to east, respectively, through the north and south sides of Nanweiquan Village, meet at Chapengtan, then flow eastward around Yuquan Mountain through the source and Zhuangyuan Village, and continue to flow eastward through Shibeidi after meeting with Xijing River in Sidi Village East. Zhuangyuan River has two larger tributaries, Xijing River and Baiguanzhuang River.

Baiguanzhuang River is a tributary of Zhuangyuan River, which originates in the west of Huangcaowu Village in Hongjing Township, flows from Wangjiazhuang Village and Baiguanzhuang Village to the south from west to east, turns from north to north in Changfan North Village, passes through Cao Zhuang Village and Sanmu Village, and flows into Zhuangyuan River 2 kilometers upstream from the source. Zhuangyuan River is 24 kilometers long (including 2 1 km in Shaanxi), with a river gradient of 20‰, a drainage area of 274 square kilometers and a riverbed roughness of about 0.065. Changfanbei Reservoir is located in Fanbei Village at the head of Baiguanzhuang Village on Baiguanzhuang River, a tributary of Zhuangyuan River. /kloc-0 was completed in May, 1966, and it is a small (1) reservoir with a total storage capacity of 1.5 million cubic meters and a controlled drainage area of 1 1 square kilometer. The reservoir dam is a gravity earth dam with a height of 22 meters, which meets the 50-year return period design flood standard and the 100 return period check standard.

The length of Xijing River, a tributary of Zhuangyuan River, is 17 km, and that of Baiguanzhuang River is 12 km. Zhuangyuan River is a winding river with a valley width of 300-500m and a river width of 80-100m. Because Nanwei Spring in the upstream is nearly dry, there is water in the river above the source in flood season, and there is clear water in the river below the source (Yuquan). Zhanghe River is located in the reach above Guantai in Cixian County, Hebei Province, with steep terrain, narrow valley, tortuous water flow, steep slope and rapid flow, natural drop obstacles such as Chibi, back wall and overpass fault, and the longitudinal slope ratio of riverbed is 1: 200 ~ 1: 300. The river from Guantai to Yuecheng Reservoir is hilly. From Yuecheng Reservoir to Xuwancang, Guantao County, Hebei Province, it is the reach of Zhanghe Plain, with a total length of 1 19 km and a drop of 64.7 meters, with an average ratio of 1:2430, of which the bottom ratio from Yuecheng Reservoir to Beijing-Guangzhou Railway Bridge is1:500 ~1:. The section from the railway bridge to Nanshangcun is 46.7 kilometers long, with steep gradient, with an average of 1:2 1.30. The river width is 500 ~1.350m, and the river depth is only1~ 2m. The beach is dense, the river is wide and shallow, and the main channel swings irregularly, which has the characteristics of wandering river. The total length of the culvert from Nanshangcun to Zhang Chuan is 2 1.84km, with an average gradient of1:2160 ~1:2440. The riverbed is sandy, with an average width of 38 1m and a depth of 2.5 ~ 5 m, and the river channel is relatively stable. The reach from Zhang Chuan culvert to Xuwancang is 35.26km long, with an average gradient of 1:3050. The riverbed is silt, with an average depth of 3.8m and a width of100 ~ 200m.

Zhanghe River has no dike above Gaozhuang, Cixian County, Hebei Province. The total length from Gaozhuang in Cixian County to Xuwancang Zuo Di is 99.7 kilometers, the elevation of dam crest is 83. 13 ~ 46.87 meters, the width of dam crest is 6 ~ 8 meters, and the internal and external slopes are 1: 3. The right dike is from Xitaiping in Linzhang to Daming Zhouzhuang 104. 1 km, with the crest elevation of 84.74-45.89 meters, the crest width of 4-6 meters, and the inner and outer slopes 1:3. Zuo Di is 0.5 ~ 1.0m higher than the right bank.

Zhanghe dike is very irregular, and the river reaches and channels in Linzhang County roll, collapse and bend, with a dike distance of 860 ~ 2,780 meters. The riverbed in Weixian County is relatively straight, with a dike distance of about 2000 meters. Entering Daming County, the dike distance gradually widened, and the widest Wandi section reached 5800 meters. Pingtou River, also known as Mayan River, is a first-class tributary of the main stream of Zhang Zhuo. It originates from the Golden Depression (located in Shimen Township) in the north of Xiaowopu Village, southeast of Wuxiang County, enters Nanyugou, Shangyao Town, Licheng County, passes through Yanghejiao, Hulujiao, Yan Ma, Houjiazhuang and Pingtou in the south, changes from Xixiazhuang Village to the southwest, then passes through Dongpo and shi ban cun, and finally reaches the southwest of shi ban cun. The total length of Pingtou River is 2 1.5km, and the drainage area is104.9km2. In Pingtou Village, Langou River flows into it. Pingtou River is a mountain flood channel with an average annual runoff of about 7 million cubic meters. There is basically no flow in the river above Maya village. Because of the exposure of Longdong Spring in Mayan Village, the clear flow of the downstream river is about 0.06 cubic meters per second.

Zhuangyuan River, a first-class tributary of the main stream of Zhang Zhuo, originates from Zhang Jiahe Village, Heshi Township in the north of Lucheng City, passes through Huanghaogou, Xiao 'aonao, Xiling, Shenzhuang and Xipo Village in the north, enters Wangqiao Town of Xiangyuan County 2.5km north of Xipo Village, turns northeast, flows through Zhuang Yuan, Jingguan and Puguan Village, and flows into Lucheng County at 1km north of Putou Village. The total length of the river is 17.5km, and the drainage area is 1 10. 10km. Zhuangyuan River is a seasonal river, which flows through hilly and gully areas, with an average annual runoff of about 3 million cubic meters. The terrain in the middle and upper reaches of the basin is broken and ravines are vertical and horizontal. The lower reaches are rocky mountainous areas and rocky mountainous areas, and the terrain is relatively complete. The elevation is mostly in 1 000 ~ 1 200m, and the estuary is 740m. The annual sediment discharge of the river is 47,300 cubic meters.

Xiaodongjiang River is a first-class tributary of the main stream of Zhang Zhuo, which originated from Laojinqiao, Dongyang Guan Town, Licheng County. It flows southwest through Donghuangxu, Tinghepu Township Dating River, Tinghepu, Lihou Town Wuqiao, Nanqiaogou, Dongwa, Xiwa, Xiqiao Township Xiqiao, Zhao Dian and other villages, and joins Zhangzhuo River on the left bank of Zhangzhuo River in the south of Zhaodian Village. The total length of the river is 20.8km, the width of the river channel is between10-30m, the longitudinal slope of the river channel is 5- 15 ‰, the river bed roughness is between 0.025-0.03, and the drainage area is 215.6km2.. This is a seasonal river. Runoff is mainly flood runoff, with a runoff of 6,543,800+049,900 cubic meters and an average sediment discharge of 6,543,800+092,300 cubic meters. The topography of the basin is hills and valley terraces. The whole river is located in Licheng basin, with Hengling as the dividing line in the north and mountains on the east and west sides respectively, and the riverbed is relatively stable. Yangnanhe River and Qilihe River join Xiaodongjiang River in Qilidian Village of Tinghepu respectively. The average annual precipitation in the basin is 531.9mm. There are 3 small reservoirs and many ponds and dams in the basin, with a total storage capacity of 6.208 million cubic meters.

Pingshun River, also known as Bailitan River and Xigou River, originated in the deep mountain area at the junction of Damendao Village and Huguan County, Longxi Town, Pingshun County. The river (ditch) above Damendao Village is called "Madao River", which is an uninhabited area, and its flow direction is west first and then north. After the river flows eastward from Damendao Village, it flows northward through the villages of Beipo, Longzhen, Nanpo, Xigou Township, Shenjiaping, Nansai, Xigou, Chuandi and Shibutou, Qingyang Town (Pingshun County) flows through Shannandi, Nanergou and Zhangjing, and then enters the northwest through Tianjiao Village, Zhongwujing Village, Xiawujing Village and Liucun in Zhongwujing Township. The total length of the river is 49 kilometers and the basin area is 677 square kilometers. The larger tributary is Nanda River, which flows into Pingshun River from the left bank in the northwest of lizhuang village, Lucheng City. Pingshun River is a seasonal river with an average annual runoff of about 6.5438+0.4 million cubic meters, all of which are flood runoff, and the clear water flow of the river is zero. There are 7 small reservoirs in the basin, with a total storage capacity of 23.32 million cubic meters, and the basin area is controlled by 3 12 square kilometers. There are water lifting projects in Anle, Xigou and Xiling.

Nanda River, a tributary of Pingshun River, is a seasonal river. Originated in the northern part of Xizhuang Village, Jidian Township, Huguan County, it is called Bai Quan River locally, and flows northeast through Xincun, Xiqiaoshang and Hedong Village in the county. After entering Pingshun, it passes through Miao Zhuang, Beiganquan, Changjia and Beishe Village, and enters Lucheng in the north of Beishe Village. In Lucheng, the river flows northeast through Camus, Papaya, Wangjiazhuang, Nantao and Niuti. There are four small reservoirs (Hedong Reservoir, Nanwuma Reservoir, Beiganquan Reservoir and Huangniuti Reservoir) in Nandahe River Basin, with a total storage capacity of 29.37 million cubic meters.

Lvshui River, a first-class tributary of the main stream of Zhang Zhuo, originated in Pushui, Xingcheng Town, Pingshun County, first flowed southeast through Xianquan, Huangya and Niushiyao, then slowly turned northeast through Niushiyao Village, and then entered Linzhou City, Henan Province through Weichi, Helougou and Jingdi Village. In Linzhou, it flows through Gaojiatai, Shiban, Nangudong, Jianzhuang, Yang Er Zhuang, Huaishuzhuang, East Pan Yang and other villages in the northeast direction, and finally flows into Zhangzhuo River from the right bank of Zhangzhuo River. In the upper reaches of Jianzhuang Village, a tributary called Jiaolanyan River is injected from the left bank. The main stream of Lvshui River is 53 kilometers long, of which the length of the section in Shanxi is 16 kilometers. The basin area of Shanxi Province is 47 1. 12 square kilometers (including the tributary area of Jiaolan Salt River and other water flowing out of the province). The average annual runoff at the outlet of Lvshui River is 4 million cubic meters, mostly flood runoff, and the clear water flow of the river is 0. 1~0.3 cubic meters per second. There are four small power stations in Lushui River Basin, with a total installed capacity of 6,483 kilowatts.

Xiaodan River, a first-class tributary of Zhangzhuonanyuan, originated at the northern foot of Liulishan (Danzhuling) at the junction of Zhangzi and Gaoping County, and separated from Danheyuan, a tributary of Qinhe River at the southern foot of the mountain. The river flows through Zhangdian and Cui Zhuang from west to east, then winds north, passing through Tian Liang, Bucun, Licun, Zoucun, South Korea and Li Jiao, where it is classified as Zhang Zhuo Nanyuan. The total length of the river is 18km, the drainage area is 120km2, and the width of the main channel is 5-20m. Guyi River, a small tributary, flows into Danhe River from the left in the northeast of Zoucun village. The annual runoff of the basin is 6.3 million cubic meters. The average annual clean water flow is 0.07 cubic meters per second. Surface water is 6.5438+0.9 million cubic meters, and groundwater is 3.6 million cubic meters.

Taoqinghe River, a first-class tributary of Zhangzhuonanyuan, originates from the north of Ximaan Village, Changhang Township, Huguan County near the junction of Huguan and Lingchuan counties, and its main stream flows through Huguan, Changzhi and Zhangzi counties, with a total length of 78.7 kilometers. This is a seasonal flood river. In Huguan, the river first flows from south to north through Xima 'an in Dongjingling Township, Han Zhuang, Liu Ze in Bai Chi Town, Dianshang Village and Gucun in Dianshang Town, then flows northwest through Xibao (Xibao Reservoir), Zhang Ziyan and Songbao in Longquan Town, turns southwest in Songbao Village, passes through Xinzhuang Village in Huangshan Township, enters Hetou Village and Xichi Village in Changzhi County, and then enters Taoqinghe Reservoir, changing to the northwest. Taoqinghe River basin covers an area of 735. 18 square kilometers, including 3210.88 square kilometers in Huguan County, 3510.5 square kilometers in Changzhi County and 610.8 square kilometers in Zhangzi County. The larger tributaries are Yincheng River and Shizhuang River (Seto River). Runoff changes greatly every year. According to the measured data of Xibao Reservoir 2 1, the coefficient of variation is 1.02. Maximum annual runoff19.7 million cubic meters, minimum annual runoff 0. This is a mountain river with seasonal rainstorm. River runoff is mainly flood flow, and the clear water flow is very small. The average annual sediment discharge of Taoqinghe River is 630,000 cubic meters. There are two medium-sized reservoirs (Xibao and Taoqinghe) and nine small reservoirs (Putaoshan, Footstep River, Shimenkou, Liu Ze, Northern Song Dynasty, Dongzhuang, Hetou, Xianquan and Fenshang) in Taoqinghe River Basin.

Shuilan River, a first-class tributary of Zhangzhuonanyuan, originates from Qiaohuagou and Shazegou of Fengyi Town at the east foot of Panxiu Mountain in Tunliu County, flows through Heijiakou, Wuzhai, Xiliuzhai and Fengyi from west to east, enters Zhangzi County in the east of Fengyi, continues to flow eastward through Yingli and Baojiahe reservoirs, flows southward in Dongli Village, and passes through Guancun, Shuilan, Dongjia and Lizhuang along the way. The river flows through the rocky mountainous area above wucun in Zhangzi County, with a gradient of 20 ~ 15 ‰. Below wucun, it flows through loess hilly area and alluvial plain with a slope of 5.2-0.63 ‰. The main tributaries of Shuilan are Jinfeng River and Yonghe River. The average annual runoff of He Lan River is 24.99 million cubic meters. The source of runoff in He Lan is mainly in the upper mountainous area, and all tributaries have clear water flow, and the dry season is 0.216m3/s. The freezing period of rivers is generally from early October to early March of the following year in 65438 10. The annual sediment transport is about 300,000 cubic meters, mainly from silty sand to fine sand.

Yingchun River, a first-class tributary of Xiyuan, Zhang Zhuo, originates from the eastern foot of Funiu Mountain in the west of Qinxian County, and its source is in the east of Luobugang Village in Bird Town. The river flows from north to south through villages such as Roy, Shangwan and Dongpo, from Dongpo to fu cun, and then flows into Hexi source, Yingchun and Xiqu in Zhang Zhuo. Between Heyuan and Fucun, several parallel small tributaries flow in from the right bank. Shibanshang River is the largest tributary of Yingchun River. Originated in Shicaogou, Yaoshan Village and Dongshan in Cecun Town, it flows north first and then east, and flows into Yingchun River from the right bank of Yingchun River in the south of Fucun Village. The total length of Yingchun River is 17.4km, the drainage area is132.88km2. The longitudinal slope of the upstream river (above Fucun) is 17.4‰, the longitudinal slope of the downstream river is 2‰, the drainage width is 10.4km, and the river bed roughness is 0.04. The annual average runoff of Yingchun River is 1, 066,5438+0,000m3, and the annual sediment discharge is 1, 205m3. There are several springs in the basin, such as Roy and Chitou, and the larger one is Qinglongchi Spring in Chitou Village, Guocun Town. Therefore, the river is clean all year round, and the water color is clear and transparent, without pollution. Yingchun River has a small (1) Yingchun Reservoir and Yingchun Irrigation Area, and a small (1) Shibanshang Reservoir is built on its tributary.

Gelu River is a first-class tributary of Xiyuan in Zhang Zhuo, which originates in the northwest of Xinzhuang Village, Cecun Town, Qin County at the junction of Qin County and Qinyuan, receives Houquan (flood) spring water and Yuhe River to the west of Yujiao Village in the upstream, flows eastward through Cecun Village, joins Li Nanhe, a tributary on the south right bank of Fancun Village, and flows into Xiyuan in Zhang Zhuo 2 kilometers east of Fancun Village. Watershed area 15 1.8 km2. The main stream of the Gru River flows through nine administrative villages: Yangjiapu, Houquan, Shuiman, Sizhuang, Hougou, Xiawan, Cecun, Hezhi and Daoxing. The main river is 26.9 kilometers long and flows from west to east, with an average longitudinal slope of 6.4‰. There are three main tributaries: one is a tributary from Nanzhuang to Cecun, which flows through four administrative villages, Nanzhuang, Nanyujiao, Beiyujiao and Cecun, with a length of 6.3 kilometers; The second is the tributary from Nanmafu to Dougou, which flows through four administrative villages: Nanmafu, Beimafu, Hsinchu and Dougou, with a river length of 6.3 kilometers. The third is a tributary from Xilin to Sijiazhuang, which flows through nine administrative villages, namely Xilin, Dongzhuang, Houjiazhuang, Shangzhangzhuang, Xiazhangzhuang, Li Nan, Zhongli, tangcun and Sijiazhuang, with a river length of 8. 1 km. There is a rainfall station in Kecun in the basin, which was built in 197 1 year and has been observed for 30 years. The annual runoff of the river is 6.5438+0.35 million cubic meters. When fresh water overflows to the estuary, the flow rate is 0.2 ~ 0.3m3/s. River sediment transport is fine sand and silty sand, and the annual sediment transport is 158000 cubic meters. There are medium-sized reservoirs (Geluhe Reservoir) 1 seat, 2 small irrigation projects (Geluhe and Wuyi Canal) and fish ponds 100 mu in the Geluhe River Basin.

Baiyu River is a large tributary of Xiyuan, which originates from Bocun, Nanquan Township, southwest of Qin County, flows through Nanquan, Guo Zhuang, Lianjiazhuang, Guxian, Xucun, Yuelingshan, Lee Tae and Nanchi Village, and then flows into Xiyuan in the southeast of Nanchi Village. The main rivers flow through Nanquan Township, Guxian Town, Xindian Town 12 Administrative Village. The river is dendritic, with the main stream flowing northeast in the upper reaches of Lianjiazhuang and east below Lianjiazhuang. The total length of the river is 32 kilometers, the basin area is 280.75 square kilometers, and the average river ratio is reduced to about 5‰. Baiyu River has four tributaries: one is the tributary from Lianjiagou to Lianjiazhuang, which flows through Lianjiagou, Badongpo, Xiazhuang, Tangzhuang and Lianjiagou, with a length of10.8 km; The second is a tributary from Sigou to Ren Dong (Houhe), which flows through Sigou, Beiji, Wu Ke, Houhe and Ren Dong, with a length of 9.9 kilometers; The third is the tributary (Qinghe) from Yangpo to Yang Lou, which flows through Yangpo, Xizhuang, Yao Ke, Dongzhuang, Anren, Xinyaozi, Yugou, Qinghe, Xiaqinghe and Yang Lou, with a length of 8.1km; Fourth, the tributary (Daixian River) from Daixian to the ancient city in the west flows through Daixian in the west and Daixian in the east, he jia zhuang, Yangwan, Xia Yao, Shage Road and the ancient city, with a total length of 7.2 kilometers. The annual average runoff is 24.93 million cubic meters, the maximum is 57.4 million cubic meters (1989), the minimum is 2.93 million cubic meters (1999), and the fresh water flow is 0.2~0.3 cubic meters per second. The average annual sediment discharge is 340,000 cubic meters. Due to the gradual improvement of vegetation, terraced fields and the management of small watersheds, the river sediment is gradually reduced. At present, the average sediment discharge is 57,500 cubic meters (1.988 ~ 1.999), and the river water quality is good. There are medium-sized reservoirs (Yuelingshan Reservoir) 1 seat, small-scale irrigation projects (Yuelingshan Reservoir) 1 seat in White River Basin, and drinking water projects for people and animals.

Guo River, called Yang 'an River in Qin County and Guhe River in Tunliu County, is a first-class tributary of Xiyuan in Zhang Zhuo. Originated in Miaoxinggou and Fenshanggou west of Han Zhuang, Yang 'an Township, southwest of Qin County, it flows through Shangwan, Shangguan, Xuzhuang, An Yang and Songjiao Village of Qin County, enters Tunliu County 2 kilometers east of Songjiao Village, and passes through Heidougou, Sanjiao, Dongpo and Gancaotan in Wuyuan Town. The vortex river in Qinxian county flows to the southeast and starts to turn after entering the station. From Sanjiao Village to Houwan Reservoir, the flow direction is northeast. The total length of the river is 33 kilometers, the basin area is 285.55 square kilometers, and the average longitudinal slope of the river is 2‰. The elevation is between 1 000 ~ 1200m, and the elevation of the entrance of Houwan Reservoir is 917.00m. There are small (2) reservoirs1seat, 2 ponds, more than 20 wells120, and the water-saving irrigation area is/.

Nihe River, a first-class tributary of Xiyuan in Zhang Zhuo, originates in the southwest of Xingshu 'nao Village, Wuyu Town, Tunliu County, flows through Dongzhuang, Xiangshuitou, Shijiagou and other villages, then exits the country, enters Angou, Yongzi, Yancun, Houbao, Dongzhou and Nanfenggou in Houbao Town, Xiangyuan County, and flows into Zhang Zhuo Xiyuan from the right bank of Dongli Village, Guhan Town. The total length of the river is 27 kilometers, and the drainage area is 1 14.35 square kilometers. The upper reaches of the river (above Yancun) flow eastward, with an average gradient of 65438 0.5 ‰, and the lower reaches flow northeast, with a gradient of about 2‰. There are two small reservoirs (1) in the basin, the water source project provided by Lu 'an Mining Bureau, the Houwan Reservoir Irrigation Area and the drinking water project for people and livestock. More than 300 mu of tidal flats have been developed.

Niehe River, called Nieshui in ancient times, is a first-class tributary of Zhang Zhuo Beiyuan. Originated in Wulipu Village, a water town in the western part of Wuxiang County, it flows through Wuxiang County, Qinxian County's Cycle, Quandian, Nangou, Chengjiagou, Dongzhaidi, Nannieshui, Yaoshangpo, Qicun, Song Cun, Niecun, Fuzhuang and Dongcun, about downstream of Guanhe Reservoir. Most of the places where rivers flow are flat valleys in hilly areas. The rivers are gentle and tortuous, and the general flow direction is northwest to southeast. In Chengjiagou-Song Cun reach, the river is basically the boundary between the two counties, but due to the swing of Pingchuan River, the river does not completely conform to the county boundary. The main tributaries on the right bank of Niehe River are Xitang River, Nannieshui River and Song Cun River, and the main tributaries on the left bank are Gaozhaisi River, Yongquan River and Mamu River. Niehe River is 48km long (Wulipu-Hekou) with a drainage area of 696.7km2 (including Pingyao 2 1.56km2, Wuxiang 42 1.8km2 and Qinxian 253.34km2). The longitudinal slope of the river is 26‰ upstream and 1 downstream. The total length of the river course is 48km, and the treatable length is 30km. 2 1 km has been preliminarily treated, including 5km of stone embankment, 6km of earth embankment and 0km of biological embankment1km. The width of the control channel is100 ~150m.

Jiahuo River, located in Jiahuo Township, Wuxiang County, is a first-class tributary below Guanyuan River in northern Zhang Zhuo. Above Jiahuo Village, it is divided into two tributaries. One originates from the south of Xiaxi Village and flows south and west through Liujiagou, Shangwangbao, Xiawangbao and Jiahuo Village. The other originates from the south of Daan Village and flows through Liuting Suburb, Shiquan and Guocun Village. The total length of the river is 19km, and the drainage area is 104.3km 2. This is a seasonal river. During the flood season, there were heavy rains and flash floods. After the rain cleared, the river dried up and the riverbed rocks were stable. The annual runoff of the river is 6.355 million cubic meters, the runoff coefficient is 765.438+0 million cubic meters per square kilometer, and the fresh water flow is 0.22 cubic meters per second. The annual sediment discharge of the river is 6.5438+0.866 million cubic meters. The soil erosion modulus in rocky mountain area is1000t/(km2 a), the rocky mountain area is1800 ~ 2000t/(km2 a), and the hilly area is 2000 ~ 2500t/(km2 a).

Pan Hong, also known as Hongshui River, is located in the east of Wuxiang County, which is a major tributary of Beiyuan in Zhang Zhuo. The upper reaches of Pan Hong (above Zhaiping Village, Hongshui Town, Wuxiang) are divided into three sources: left, middle and right, and the three sources generally flow from north to south. The left side originates from Yanwa Village, Murphy Town, Wuxiang County, and flows through Murphy, Ma Bao, Xincun, Baihe and other villages. Originated in Shen 'ao Village of Zuoquan County, it entered Wuxiang via Sanjiao, Sanjiagou and Fokou Village of Zuoquan County, then passed through Yushigou West of Murphy Town, Beitai and Nantai of Hongshui Town of Wuxiang County, and merged with Zuoyuan in the southwest of Baihe Village to flow to Hongshui and Zhaiping. Youyuan comes from Jiayangou, Yushe County. After entering the flood town of Wuxiang, Management Village, Camel Village and Shangshiqiang Village pass through Xiashiqiang, Upper Huangyan, Guang Zhi, Donggou and Xigou, and meet with Zuozhongyuan in the south of Xigou Village and the north of Zhaiping Village. After the confluence of the three sources, Pan Honghe flows southwest through Zhaiping, Dianshang, Nakamura, Panlong, Xingtang and Xiabeizhang in Zhangjian Town, and after leaving Wuxiang, he returns to Zhang Zhuo Beiyuan in South Zhang Cun, Xiying Town, Xiangyuan. The total length of the river is 40 kilometers (Shen 'ao-Hekou), and the basin area is 525.438+0 square kilometers. Along the Pan Hong, Guang Zhi River (called Huangyan Water in ancient times), Yaowan River, Shimen River and Moyu River meet. The average annual runoff of this river is about 38 million cubic meters. Generally, the flow rate of clean water is 0.0 13 m3/s. The annual sediment discharge of rivers is 760,000 cubic meters.

Shimen River, a first-class tributary of Panhong River, originates from Panlong Town, Wuxiang, on the west side of the watershed between Panhong River and Qingzhang River, flows northwest through the southern suburbs and suburban villages, then turns west, passes through Shimen Village and Wen Zhuang Village, and joins Panhong River to the east of Hebuling Village. The total length of the river ditch16.7km, and the drainage area100.6km2.. Along the way, there are Shiweng River and Malantou River. Shimen River is a seasonal river, which is basically dry at ordinary times. During the flood season, there were heavy rains and flash floods. After the rain cleared, the river dried up and the riverbed was rocky and stable. The upper reaches of the basin are rocky mountainous areas, and the middle and lower reaches are mainly mountainous areas. The annual runoff of the river is 5.335 million cubic meters. The landform of the basin is rocky mountain area and hilly area, and the limestone area is about 20 square kilometers.

Shishui River, a first-class tributary of Beiyuan, Zhang Zhuo, originated in Shuiao Village, Qin County, and went south to the east of Li Jiazhuang, Qin County along the junction between Qin County and Xiangyuan County, and entered Wangcun Town, Xiangyuan County. It flowed southeast through Shibei, Xiamiao, Wangcun, Beiyao and Dianshang, and then slowly turned northeast, passing through Shuinian Village, Xiguan County, Xia Liang, Xipo and Xialiang Town, about 65438 west of Xidan Village. In Wangcun, Longwangtang River, a tributary, flows through the left bank. Shishui River has a total length of 27 kilometers and a drainage area of 190.83 square kilometers. The general clear water flow of Shishui River is about 0.05 cubic meters per second. The average annual runoff is about100000 cubic meters. The clear water flow of rivers is 0. 13~0.22 cubic meters per second. The annual sediment discharge of this river is 87,300 cubic meters. There are three small reservoirs on the Shi Shui River, namely Dongfeng Reservoir, Diandong Reservoir and Wang Jiayu Reservoir.