Long-term observation dataset of water quality chemical monitoring in Qianyanzhou (2003–2023)

It includes data from rainfall， surface water, and groundwater. The rainfall dataset contains basic parameters like pH, SO₄²⁻, and electrical conductivity (EC).

Surface and groundwater data systematically monitor 12 key indicators, including pH, Cl⁻, TN, TP, Ca²⁺, Mg²⁺, K⁺, Na⁺, SO₄²⁻, PO₄³⁻, NO₃⁻, and EC. Using standardized sampling and laboratory analysis, a 21 year’s water quality database was built. The dataset records soluble materials migration during the hydrological cycle, offering basic data for simulating biogeochemical cycles, studying water - environment benchmarks, tracing pollution sources, and analyzing hydrological responses to climate change.