Turbidity sources include clay, silt, fine organic matter, plankton or microorganisms. High turbidity will affect the appearance of the water body and hinder the penetration of light, thereby affecting the photosynthesis of aquatic plants. High turbidity also blocked the respiration of fish, affecting fish to growth and its reproduction, and even suffocation and death.

Turbidity Statistical Chart of Plum Tree Creek

Analysis：

Origin-pollution free

Headstream-mild pollution

Midstream-mild polluted because of the forest and self-cleaning ability

Downstream-serious polluted

Reference：

Environmental Protection Administration, R.O.C.(Taiwan)