Evaluation of three prevalent global riverine nutrient transport models

Research Square (Research Square), Год журнала: 2023, Номер unknown

Опубликована: Авг. 2, 2023

Abstract Global nitrogen (N) and phosphorus (P) transport models provide a quantitative assessment of riverine nutrient source, transport, accumulation depletion processes. By conducting meta-analysis the modeled results accuracy metrics from previous studies, this study evaluated accuracies their influencing factors three prevalent global N P (Global NEWS, IMAGE-GNM WorldQual). The NEWS model exhibited higher in predicting dissolved organic (DON; R 2 = 0.58, NSE 0.57) (DOP; 0.59, 0.59) yields compared to inorganic (DIN; 0.56, NSE=-0.80) (DIP; 0.33, NSE=-0.12) yields. DIN DIP sub-models were applicable for basins with areas greater than 2.2×10 4 km 3.2×10 , respectively. demonstrated satisfactory total (TN; 0.53) (TP; 0.48) concentrations, particularly European basins. performed better simulation TN concentration when data set was longer 21 years regions above 54°N, TP 22 55°N. WorldQual relatively poor performance simulating (R 0.76, 0.34) 0.71, NSE=-0.25) concentrations. For improvements future, would benefit more detailed in-stream retention/release transformation modules, while improved chemical weathering dynamics could further enhance NEWS. IMAGE-GNM, modification soil erosion module is warranted efficiency outside Europe. Consideration legacy effects required improve these models. valuable guidance selecting improvement specific needs.

Язык: Английский

A Hydrological Boundary Determining Approach for River-Lake Transition Zone: A Case Study of Baiyangdian Lake, North China

Опубликована: Янв. 1, 2023

River and lake ecosystems converge to form transition zones, which play a key role in the flow of organisms, matter energy. Although importance zones has been gradually recognized, there is still lack unified understanding on hydrological boundary division. In this study, method determining zone based water quality gradient was proposed. The results showed that corresponding areas three namely Fu River-Baiyangdian Lake, Xiaoyi Lake Baigou Canal-Baiyangdian under critical conditions were 37.92, 34.11 24.99 km2, respectively. purpose study explore new way determine river-lake provide scientific basis for further research quality-ecological response optimal allocation resources zone.

Язык: Английский

Evaluation of three prevalent global riverine nutrient transport models

Environmental Science and Pollution Research, Год журнала: 2023, Номер 30(58), С. 122875 - 122885

Опубликована: Ноя. 18, 2023

Язык: Английский