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| DOI | 10.1080/20442041.2024.2305105 |
| Nutrient retention in a small reservoir under changed variability of inflow nutrient concentration | |
| 发表日期 | 2024 |
| ISSN | 2044-2041 |
| EISSN | 2044-205X |
| 英文摘要 | Within freshwater networks, lakes and reservoirs are reactors that modify nutrient dynamics. Their functioning is based on an interplay of hydrological and biogeochemical processes, rendering them vulnerable to climate change. Future changes in catchment characteristics are likely to alter the timing and magnitude of nutrient concentrations in discharge. This study investigated the impact of changing variability of nutrient concentrations on lake and reservoir dynamics. We examined intraannual nutrient retention and analyzed the role of reservoirs in reconfiguring the variability of nutrients. Utilizing the 1D lake model GOTM-WET, we simulated nutrient processing in a mesotrophic reservoir. Further, we performed scenario simulations by modifying the variability of inflow nitrogen and phosphorus concentrations. Our findings indicate that the reservoir removed similar to 4% and similar to 12% of total nitrogen (TN) and total phosphorus (TP), respectively. Particulate fractions were retained efficiently, but there was a net export of dissolved organic fractions. Regarding mixing and stratification periods, however, we observed net nitrogen export during stratification in certain years. During stratification, outflow concentration variability remained relatively unchanged for TN and TP compared to inflow concentrations. Conversely, phosphate and nitrate concentration variability increased in the outflow because of in-lake assimilation and the influence of hydrological events. With increasing inflow concentration variability during stratification, there was decreased removal of TN and TP by the reservoir, but increased variability of concentration. By evaluating the lake's capacity to attenuate variability of nutrient inflows under altered conditions, there are opportunities to improve monitoring of nutrient export and evaluate the potential impact of nutrient peaks on downstream drinking water resources and ecosystems. |
| 英文关键词 | catchment-lake interaction; GOTM-WET; lake nutrient export; reservoir biogeochemistry; concentration variability |
| 语种 | 英语 |
| WOS研究方向 | Marine & Freshwater Biology |
| WOS类目 | Limnology ; Marine & Freshwater Biology |
| WOS记录号 | WOS:001217550800001 |
| 来源期刊 | INLAND WATERS
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/289364 |
| 作者单位 | Helmholtz Association; Helmholtz Center for Environmental Research (UFZ); Helmholtz Association; Helmholtz Center for Environmental Research (UFZ) |
| 推荐引用方式 GB/T 7714 | . Nutrient retention in a small reservoir under changed variability of inflow nutrient concentration[J],2024. |
| APA | (2024).Nutrient retention in a small reservoir under changed variability of inflow nutrient concentration.INLAND WATERS. |
| MLA | "Nutrient retention in a small reservoir under changed variability of inflow nutrient concentration".INLAND WATERS (2024). |
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