Regulation of Mianyuan River

In March, 20001year, Deyang Municipal Party Committee and Municipal Government made a comprehensive renovation decision focusing on sewage treatment, environmental management and function improvement from the perspective of practicing Theory of Three Represents, building an ecological barrier in the upper reaches of the Yangtze River and improving people's living and commercial environment. In July, 20001year, Tongji University Urban Planning and Design Institute was entrusted to design Jinghu Lake, Mianyuan River urban section, with a length of 16. 1 km. In April 2002, the comprehensive improvement project of Jinghu Lake was officially started. From 2002 to 2006, the comprehensive improvement project was listed as a key project by Deyang Municipal Party Committee and Municipal Government, and it was promoted in an all-round way. At present, the mother river "sky blue, clear water, green shore and beautiful scenery" has become a beautiful landscape in Beijing, reappearing the charm of youth.

Mianyuan River was called Mianshui in ancient times. The length of rivers in China is 1 1.9 km, which flows through Lianshan Town, Shuangquan Township, Song Lin Town and Sanshui Town, joins Shi Ting, and leaves Zhao Zhen to enter Tuojiang River. It belongs to the precipitation recharge river. The river is 268 meters wide. The rainwater collection area is 80 square kilometers. The total annual runoff is 5120,000 cubic meters.

The climate of Jingyang District belongs to subtropical humid and semi-humid climate zone. The general climate features are: distinct seasons, mild climate, abundant rainfall, little sunshine, frequent natural disasters and different intensities. The annual average temperature 16.0℃, the highest temperature is 36.5℃, the lowest temperature is -6.7℃, and the temperature difference is 43.2℃. The annual average sunshine hours 12 15.4 hours, and the annual average rainfall is 893.4 mm, of which the summer rainfall is 536 mm, accounting for 60% of the annual average rainfall.

When the seasons alternate, the hot and cold air activities are frequent and intense, forming a monsoon dominated by the northeast. The annual average wind speed is 1.5m/s, and the instantaneous maximum wind speed is14.3m/s. The frost-free period lasts for 276 days. The main climatic disasters that occur all the year round include low temperature freezing injury, drought, flood, strong wind, hail, autumn frost, cold wave and so on. The low-temperature freezing weather mainly occurs from late March to early April, with a frequency of 70%. Spring drought, summer drought, summer drought and winter drought often occur. The frequency of spring drought is 40% from the beginning of March to the end of April, and the frequency of summer drought from late April to early July is 86%. The frequency of summer drought is 6 1% from the end of June to the beginning of September, and the frequency of winter drought is 40% from February to1October of the following year. The frequency of floods in summer and autumn is 50%, with an average of 0.75 times a year. Strong winds above magnitude 6 occur 0.86 times a year on average, and hail disasters occur 0.8 times a year on average. September to 165438+ 10 is the prone period in Qiu Lin, with an average of 1.89 times a year, and from February to February of the following year, with an average of 1.52 times a year.

The main features of climate are: distinct seasons and mild climate; There is abundant precipitation, no heat in summer and no cold in winter. Annual average temperature 16. 1 degree, frost-free period 27 1 day, annual precipitation 893mm, sunshine 125 1.5 hours. The main disastrous weather is chilling injury, drought, flood, hail and autumn rain. The area of cultivated land in the whole region is 33,683.5 hectares, accounting for 56.84% of the total area, and the area of forest land is 9,354.4 hectares, accounting for 14.4% of the total area.