[1] The Jin River has a long and complex cultural history, dating back to 256 BC when it was formed.

[3] Flowing the provincial capital of Chengdu city, the river historically provided a source for irrigation, boat travel, and a means to dispose of wastewater.

[3][4][5][1] As the cities’ population increased, pollution of the river became a major environmental concern leading to regulation projects beginning in 1993.

[6] The current ecological state of the river is degraded as it is overloaded with dissolved nitrogen and phosphorus inputs from urban sources.

[7] Alongside the riverbank of the Jin River, theme parks were built and numerous tourism programs were created.

[10] From the confluence point to Hexin Village, the Baidu Map calls this reach the Fu River.

The current Jin River has eutrophication issues caused by different types of urban wastewater such as sewage discharge, road surface runoff, and effluent.

The growth rate of Chlorophyll a is limited by nitrogen but not by phosphorus according to the determined N:P ratio in the Jin River's water column.

If any wastewater or effluent that contains a large amount of TDN enter the river, it is likely to trigger an algal bloom.

[7] Historically, the Jin River was once a wide channel that had enough water volume to support boat travel in and out of Chengdu.

[3] It has been estimated that during the early 1900s the Jin River once supported ships that could displace water volumes from 8 to 30 tons.

[5] During the Jin Dynasty (266-420 AD), General Wang Jun led a navy of 70 boats, each capable of carrying 1,000 people, down the river to attack the Eastern Wu.

[3] Shortly after the 1950s, the Jin River's size and water levels rapidly declined to conditions that could no longer support the boating industry of ancient times.

[3] The river has a history sediment accumulation due to both natural and anthropogenic factors which in the past led to congestion and flooding.

[15] At the end of the 1980s, due to increased populations and the development of Chengdu, the appearance of the Jin River changed with greater rates of sediment accumulation.

With the decreased water inflow from upstream of the stream channel, the sediment deposits increased reducing the discharge passing the section.

[15] As far as human factors are concerned, with the continual increase in city residents, some business owners and citizens built houses on the riverbanks and occupied the riparian zone.

[1] Moreover, when the rapid growth of a consumer-based economy was combined with lack of wastewater regulation and treatment, the Jin River became like a septic tank of Chengdu.

The Municipal People's Government was awarded a prize for improving the environment of the river, from the United Nations.