Characteristics of Tongjiang River

Tongjiang city belongs to the swamp plain of ancient alluvial subsidence, and there are a few mountains formed by sporadic veins in the outer Xing 'an Mountains. The overall terrain is high in the southwest and low in the northeast, with an average elevation of 45 meters to 65 meters and a slope of 1/5000 ~ 1/8000, with little difference in landform combination. Tongjiang City is located in the hinterland of Sanjiang Plain, on the south bank of the confluence of Heilongjiang and Songhua River. The jurisdiction borders Fuyuan County in the east, Fujin City and Raohe County in the south, Suibin County in the west and Khabarovsk Krai in Russia across the Heilongjiang River in the north. The border line is170km long, with a total area of 6,300km2.

2. Climate characteristics

Tongjiang city is located in the humid climate zone in the middle temperate zone, which belongs to the continental monsoon climate, with obvious differences among the four seasons. Winter is cold and long, with north wind and dry climate; Summer is short, warm and rainy, southerly, with concentrated rain and humid climate; In spring and autumn, the climate is changeable and windy due to the alternation of winter and summer monsoon. The annual average temperature is 2.9 degrees, the average temperature in Leng Yue (65438+ 10 month) is -20.0 degrees, and the extreme minimum temperature is -40.8 degrees. The average temperature in the hottest month (July) is 22. 1 degree, and the extreme maximum temperature is 37.7 degrees. The annual average frost-free period is 142 days. The average annual precipitation is 532.7mm, and the precipitation from May to September accounts for 79.2% of the whole year. The annual average sunshine hours are 2600 hours, and the accumulated temperature is ≥ 10 degrees, ranging from 2083.3 to 2786.0 degrees, with an average of 2456.8 degrees over the years.

3. Characteristics of natural resources

The forest area of Tongjiang City is 7 1.00 mu, and the forest coverage rate is 18.2%. There are more than 20 tree species such as birch, seedling oak, larch, pineapple and Fraxinus mandshurica, including hazelnut, walnut, grape and other dried fruits and berries, bracken, mushroom, auricularia auricula, Hericium erinaceus and other fungi, as well as Acanthopanax senticosus, Radix Astragali and Radix Codonopsis. The wild animals in Tongjiang City include bears, wild boar, roe deer and pheasants. 16 There are 73 kinds of fish. Fish mainly include wild carp, white fish, grass carp and crucian carp in Heilongjiang. And more precious sturgeon and salmon.