Water quality monitoring results of the Tanglangchuan - Pudu River

Each row corresponds to one observation and contains 14 variables. The first column identifies the name of the monitoring cross‑section.

The second column indicates the sampling location within the section, coded as 1 for the left bank, 2 for the mid‑channel, and 3 for the right bank. Columns three through five provide the sampling date, recorded separately as year, month, and day. The next six columns are water quality parameters: total nitrogen (TN), dissolved total nitrogen (DTN), nitrate nitrogen (NO₃⁻‑N), total phosphorus (TP), dissolved total phosphorus (DTP), and orthophosphate (PO₄³⁻‑P), all expressed in mg/L. The twelfth column gives chlorophyll‑a concentration, measured in μg/L. The final two columns contain the geographic coordinates of the sampling section, namely longitude (east) and latitude (north), in decimal degrees.