Fig 1.
Illustration of Aha Reservoir and the Xiaoche River showing sampling locations.
(a) photo of the culvert with discharge pipe inside. (b) photo of the spillway. L1 and L2 represent two sampling sites in Aha Reservoir; R1 and R2 represent two sampling sites in the Xiaoche River.
Fig 2.
(a) the culvert water. (b) the discharge pipe water. (c) plants attached with white material. (d) milky-white and turbid river water. (e) photo showing river-whiting phenomenon in Qianzhong Morning Post [17]. (f) river-whiting phenomenon disappearing gradually downstream.
Table 1.
The physico-chemical characteristics of the culvert water, discharge pipe water, spillway water and river water.
Table 2.
Hydrochemical compositions in the water column, culvert water, spillway water and discharge pipe water.
Fig 3.
Variations of T、EC、ORP、DO、TDS in the water column of Aha Reservoir in September (stratified period) and March (non-stratified period).
Sep-1 and Mar-1 represent reservoir water at station L1 sampled in September and March, respectively; Sep-2 and Mar-2 represent reservoir water at station L2 sampled in September and March, respectively.
Fig 4.
X-ray diffraction spectrum of the white materials in the Xiaoche River.
Fig 5.
Profile variations of the sulfur contents in the sediment of Aha Reservoir.