The water quality of the Yellow River Basin is getting more and more polluted, and the situation of water pollution is more serious. In 2003, the length of surface water in the Yellow River Basin exceeding the third water quality standard (hereinafter referred to as exceeding the standard) amounted to 78.6 percent, compared with 68.8 percent in 1994, an increase. The worst water quality in the past ten years was in 1997 and 2002, with 80% and 80.6% of the river length exceeding the standard respectively.
Compared with the water quality of the whole basin, the development trend of pollution in the main stream of the Yellow River is more serious. After 2000, the water quality dropped sharply, and the length of the river exceeded the standard in 2003 amounted to 78.1 percent. Compared with 1994, the length of the river exceeding the standard has increased by 20.7 percent. At present, the most seriously polluted sections of the main stream of the Yellow River are mainly concentrated in the sections from Shizuishan to Wuda Bridge, from the mouth of Sanhu River to Lama Bay and from Tongguan to Sanmenxia.
Expanded:
The main problems of pollution of the Yellow River:
1. The upper reaches are arid and semi-arid areas with low precipitation rate levels, the middle reaches are the main recharge areas but with serious soil erosion and seasonal variations, and the lower reaches of the watershed are small and have little recharge;
2, Fast population growth in the basin, the population growth rate far exceeds the growth rate of food;
3, in recent decades, with the development of society, industrial and urban water consumption along the Yellow River has been increasing, and the area of irrigation from the Yellow River has been expanding;
4, the reservoirs have low regulating capacity, and the management of water resources is inconsistent;
5, the water is cheap, and the low price of water can't awaken the people's awareness of water conservation, and the waste of water in industry and agriculture is great;
6, the water supply is low, and the water supply is high.
6, environmental pollution drastically reduces the utilization rate of the Yellow River water.
Baidu Encyclopedia-Yellow River Water Quality