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Binh Duong province: development potential – Part 2 Print
Thursday, 12 January 2012 15:09

Natural Resorces

Soils:

From history geological formation, the change of high altitude from terrains and alluvium covering on soil along river and streams, Binh Duong has rich soils  and strong ground that are suitable to plant short and long-term industrial trees/plants, build industrial pasks and civil projects.

 

Six main soil groups:

Alkaline soil: 3,304 hectares, making up 1.22% in natural area.

Alluvium: 15,725 hectares, making up 5,79% in natural area.

Grey soil: 142, 445 hectares, making up 24% in natural area.

Sloping soil: 32,848 hectares, making up 12.09 in natural area.

Poor, rocky and eroded soil: 91 hectares, making up 0,03% area and

Rivers, lakes: 12, 135 hectares, making up 4.46%

 

Binh Duong mostly has composition of little heavy soil, high sand proportion, particularly in kinds of soil formed on ancient alluvium soil that absorb water so poorly, and are easily eroded. The alluvium has composition of little and average heavy soil. Alkaline and sloping soils have composition of clay from 44-51%. This is rich soil, which is suitable to plant rice and crop rotation of cereals. On chemical properties, Binh Duong soil mostly is poor nutrients (N,P,K). However, the alluvium and alkaline soil has high humus proportion from 2.1 – 8.5% nitrate 0,178 – 0.28%, phosphorus 0.098% - 0.120%, potassium 0.98 – 1.65%. Grey and reddish soil is poor in phosphorus and potassium (0.06 – 0.08%).

 

Water:

Surface water: There are the 3 main rivers of Sai Gon –Dong Nai system that flows through Binh Duong province:

The Be river: Rising from a mountain region of west and south highland with altitude of 650-900m. The River with its basin area of 7,650 square km is 350km long and flows across Binh Phuoc province. A lower section of the river is 80km long and flows through Phu Giao and into the Dong Nai River. Because of its narrow bed, it runs fast in the rain season which causes its flow unequally and lack of water in the dry season, so it has little value on water transportation but has value on hydraulics at some subordinate rivers like Giai stream... And it is the resource of underground water for the province’s north region.

 

dong_nai_3

The Dong Nai river: Rising from the Lang Biang Highland at high altitude of 1,700 meters and flows through provinces of Lam Dong, Dong Nai, Binh Duong and Ho Chi Minh City. The Dong Nai river, a big one, is 635km long. Its basin is 44,100 square km. Total average volume of current is 16.7 billion cubic meters/a year. Total quantities of sand and mud carried by the river are 3,36 million tons/ year. This is a resource of sand supply for increasing construction need in the SKER.    

            

The part of the river flowing through Tan Uyen district is 90km long and the average flow of the River in here is 485 cubic meters/ a second, and its gradient is 4.6%.

 

The Dong Nai river has big value on transportation, mineral resources, water supply for industrial parks, urban areas, agricultural production, specially in Tan Uyen, an area of fruit plants and industrial plants/trees of the province.

 

The Sai Gon river: Rising from Cambodia and flows across Loc Ninh district’s northwest mountains at high altitude of 200-250m. The Sai Gon river, whose basin is 5560 square km, is 265km long; its length flowing through Dau Tieng to Lai Thieu is 143km; it expands 100m wide and 200m wide at Thu Dau Mot town. An average flow is 85 cubic meters/ a second.

 

Its gradient is only 0,7%, so it has value on transportation, agriculture, water production and ecological tourism.

 

Except for the 3 main rivers, there are also the Thi Tinh river, canals of Ba Lo, Ba Hiep, Vinh Binh and Ong Co... The density of rivers and canals in the province is from 0.4 – 0.8km/square km. Flow of canals and rivers are not much. There is a current in big canals and rivers. canals in higher regions have low levels of water and run out of water in the dry season, affecting the supply for agricultural production.

 

In brief, surface water resource potential is rather plentiful. Every year, rivers and canals in the province carry much water volume. However, because of being affected by the monsoon, their currents are also classified into 2 seasons – a flooded season and a dry one. This is a disadvantage of water resource usage for life and agricultural production development in the province.

 

Underground water

Underground water is rather plentiful and divided into 3 areas:

 

A much underground water area: the area is distributed from Ben Cat district to the Sai Gon river. There are some places in Thanh Tuyen in which water level reaches 250 liters/a second. The layer holding water is from 15 to 20 meters thick.

 

The average much underground water area: distributed in Thuan An district (apart from alkaline area). Drilling wells with their flow of water are 0.05 – 0.6 liters/ a second, the layer holding water from 10 to 12 meters thick.

 

The poor underground water area: distributed in the east and north – east Thu Dau Mot, and scattered in valleys along the rivers of Sai Gon and Dong Nai that belong to the fourth sediment. Wells’ water flow is Q = 0.05 – 0.40 liters/ a second, but usually Q = 0.1 – 0.2 liters/ a second. (to be continued)



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