Research of the WRTDS model on long-term changes in water quality: progress and perspectives
CHEN Hai-tao1, WANG Cheng-cheng1, SONG Meng-lai1, DING Han1, REN Qiu-ru1, REN Jia-xue2, WANG Yu-qiu1
1. College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; 2. Research Institute for Environment Innovation (Tianjin Binhai), Tianjin 300452, China
Abstract：Evaluating changes and trends in surface water quality and obtaining accurate information on water quality or nutrient loading from upstream to downstream in a watershed is crucial to the effective management of water resources. Recently, along with the increase in the length of water quality datasets, the upgrading of statistical methods, and the improvement of computer software and hardware, a series of statistical methods have been used to explore and analyze water quality trends and flux changes. Weighted Regressions on Time, Discharge, and Season (WRTDS) have evolved into the primary model for long-term continuous water quality trend analysis due to the relative complexity and flexibility. This article reviewed the research progress of WRTDS model in water quality analysis, summarized the basic principles (concentration/flux and normalized flux concentration/flux estimation) and development of the model, sorted out the current methods and applications on water quality trends and flux estimation, and outlined the application of the model to long-term water quality changes and trends and comparison with other models. Lastly, we analyzed some shortcomings of the WRTDS model, and combined with the actual water environment problems in China, we foresee that the WRTDS model can be extended and combined with watershed models, remote sensing inversion, artificial intelligence and other technical means to better guide watershed water environment management in the future.
陈海涛, 汪成成, 宋梦来, 丁晗, 任秋茹, 任佳雪, 王玉秋. WRTDS模型对长时间序列水质变化的研究进展[J]. 中国环境科学, 2023, 43(S1): 268-276.
CHEN Hai-tao, WANG Cheng-cheng, SONG Meng-lai, DING Han, REN Qiu-ru, REN Jia-xue, WANG Yu-qiu. Research of the WRTDS model on long-term changes in water quality: progress and perspectives. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(S1): 268-276.
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