1.2.3. 1 Yellow River
The Dongying section of the Yellow River starts from Binzhou boundary, runs through Dongying City from southwest to northeast, and flows into Bohai Sea in the northeast of Kenli County, with a total length of 138km. The runoff of the Yellow River changes greatly during the year, and the distribution is uneven during the year. It is characterized by less water and more sediment, and the runoff ratio in dry season is 4.63: 1. July ~ 10 is the flood season, and the flood comes from the storm runoff in the middle and upper reaches. The Yellow River has the largest discharge, the largest velocity, the highest water level and the largest sediment concentration in a year. In other months, the water level is low and the water flow is stable. According to the data of Lijin Hydrological Station 1950 ~ 2004, the average annual runoff of the Yellow River is 33.26 billion m3, with the maximum of 973100000 m3( 1964) and the minimum of1880000 m3( 1997). The maximum flow10400 m3/s (1July 958), and the minimum flow is to intercept the main stream; The average annual sediment discharge is 836 million t, with the maximum value of 2 1 100 million t( 1.958) and the minimum value of1.500 million t( 1.997). Since the 1990s, the annual runoff of the Yellow River has been reduced, and there are frequent interruptions. After 1999, the Yellow River Conservancy Commission strengthened the management of water transfer along the Yellow River and implemented scientific water transfer measures, which slowed down the phenomenon of water cut-off and realized continuous flow in recent years.
1.2.3.2 Xiaoqing River
Xiaoqing River is a multifunctional river integrating flood control, irrigation and drainage. It originates from Baotu Spring in Jinan and Jinan and Changqingquan, flows through Licheng, Zhangqiu, Gaoqing, Zouping, Boxing and Guangrao counties, and enters the Bohai Sea from Yangkou Town in Shouguang County. Dongying City has a drainage area of 585km2 and a river length of 34km. With the continuous development of industrial production in the upper reaches and along the river, the river water is seriously polluted, with an average annual flow of 24.4m3/s and an average annual inflow of 770 million m3. Xiaoqing River has become an important pollution source of soil and groundwater along its coast due to river leakage and coastal irrigation.
1.2.3.3 Zihe
It originates from Lushan Mountain in the middle of Shandong Province, with a total length of 14 1.45km and a drainage area of151km2, and flows from south to north in the area, with a length of 37.8km. In recent years, due to the decrease of precipitation, rivers leak to replenish groundwater, and there are few rivers in flood season. Due to the discharge of sewage from upstream industrial production, the river water is seriously polluted, and the shallow groundwater along the coast is also polluted to varying degrees.
1.2.3.4 purple wheat purchase
Originating near Heilizhai, Guangrao County, it is a seasonal drainage channel with a total length of 48.2km, with an average annual runoff of 309 million m3.
1.2.3.5 Guangli River
Originally a natural river ditch, it is now the backbone flood control river in Dongying city center, which belongs to seasonal drainage river. It starts from Zhanwangyingmen south of the Yellow River in the west, passes through the east and west areas of Dongying City, enters the sea through Guangli Port, and reaches the dampproof dike, with a total length of 47.3km. The basin is connected with Hongyi Basin in the north and reaches Wugan in the south, with an area of 5 10 km2. The design standard of upstream section is once every five years, and the designed drainage flow is 253m3/s; The 50-year flood control standard for the urban section and downstream reaches is1/7000 ~110000, and the maximum flood discharge is 354m3/s.
1.2.3.6 Shenxian 'gou
This is a natural passage into the sea. At the end of 1960s, Shengli Oilfield was developed and constructed in isolated island area, and the existing navigation channel was formed by excavating and dredging the original navigation channel. Mainly responsible for drainage of oil wells and water injection wells in Gudao Town, xianhe town and Ji Jun production bases and coastal areas. The original river is 38 kilometers long. After the completion of the banded reservoir from 1996 to 18km upstream, Hongqi ditch, a tributary of the original Shenxian ditch, and 20km downstream of the original Shenxian ditch are collectively called Shenxian ditch, with a total length of 30.0km and a drainage area of 350km2. There are two tributaries, Xinweidong River and Pile, which are highway ditches. The drainage flow of Shenxian ditch is 22 ~102m3/s.
65438+ Caoqiaogou
The upstream reaches 200 meters north from the foot of the South Yellow River dam in Yongfu Village, Beiling Township, Lijin County, and joins the east main stream of Caoqiaogou, Xinhe Village, Liuhe Township, with a total length of 46.0km and a drainage area of 472km2. It has three functions of flood control, drainage and moisture prevention.
1.2.3.8 New River
In order to drain water and prevent moisture, the river flows into the sea alone. The upstream reaches the sea from Bokou Village, Chen Zhuang Town, Lijin County, passing through the west side of Bohai Farm in Luoting Town and the east side of the government residence in Hekou District to the northwest of Diaokou Township, with a total length of 32.6km and a drainage area of 504km2.
1.2.3.9 Xinweidonghe
From the paper mill of Ji Jun Base in Gudao City to the east, through the east side of Gudong Town to the northeast of Gudong Reservoir, it flows to Xianhe Town to the north, where it meets Hongqigou and flows into Fairy Valley. The total length is 24.70km, and the drainage area is 160km2. The designed maximum drainage flow is 31m3/s.