Modeling nutrient release with compiled data in a typical Midwest watershed
Modeling nutrient release with compiled data in a typical Midwest watershed
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使用典型中西部流域的汇总数据对养分释放进行建模
DOI：
10.1016/j.ecolind.2020.107213
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发表时间：
2021
影响因子：
6.9
通讯作者：
Aihua Li
中科院分区：
文献类型：
--
作者：
Bangshuai Han;A. Reidy;Aihua Li
迫切需要一种易于采用的方法来估计不同的土地使用和管理做法如何影响区域养分释放到水体中。印第安纳州的怀特河流域作为中西部典型的农业主导型流域，观测到大量的营养盐从扩散源释放。在这项研究中，我们综合土地利用变化情景，从文献中汇编的实验数据，和一个易于采用的养分模拟模型，以检查土地利用对养分负荷和输送的影响，并确定在怀特河流域养分释放的敏感区域。营养物输送率（NDR）模型和情景生成器工具中的InVEST（生态系统服务和权衡的综合评价）生态系统建模框架，在这项研究中采用，由于其能力，基于生态系统的评估和简化的营养物负荷和交付功能。根据文献中的区域营养盐输出系数值建立了怀特河流域的营养盐负荷和输送模型，并利用现有的水质监测数据对模型进行了松散校准，结果表明，农业区单位面积释放的营养盐较多，而森林区单位面积释放的营养盐较少。城市对氮素释放的敏感性高于磷素。在AgExpansion情景下，总氮和总磷的释放量将比现状增加2.1%和2.6%，而在Pre-Settlement情景下，总氮和总磷的释放量将减少73.7%和88.0%。开发的方法是有益的流域保护，避免计算复杂的社会和生物物理过程，通知和指导保护实践，揭示在不同的土地利用情况下，流中的营养物质的影响最大的地区。所建立的实验数据库可作为今后类似研究的基础。该方法将有利于当地社区，并可能很容易地应用于其他农业占主导地位的中西部地区。
There is a critical need for an easy-to-adopt approach to estimate how different land use and management practices affect regional nutrient release into water bodies. As a typical agriculture dominated watershed in the Midwest, Indiana’s White River Watershed has observed large amounts of nutrient release from diffusive sources. This situation will likely worsen with population growth, climate change, and land use change.In this study, we integrated land use change scenarios, experimental data compiled from literature, and an easy-to-adopt nutrient simulation model to examine the effects of land use on nutrient load and delivery, and identify the sensitive areas of nutrient release in the White River Watershed. Nutrient Delivery Ratio (NDR) model and the Scenario Generator tool within the InVEST (Integrated Valuation of Ecosystem Services and Tradeoffs) ecosystem modeling framework, were adopted in this study, due to its capacity for scenario-based assessments and the simplified nutrient load and delivery functionality. Region-specific nutrient export coefficient values were compiled from literature and applied to model nutrient load and delivery in the White River Watershed, and the model was loosely calibrated with existing water quality monitoring databases.Results showed that the agricultural area releases more nutrients per unit area, while the forest area releases much less nutrients per unit area. Urban area is more sensitive to nitrogen release than phosphorus. Under the AgExpansion scenario, total nitrogen and phosphorus release would be 2.1% and 2.6% higher than the current situation, while under the Pre-settlement scenario, total nitrogen and total phosphorus release would decrease by 73.7% and 88.0%. The approach developed is helpful for watershed protection that avoids computation of complex social and biophysical processes, to inform and guide conservation practices by revealing areas with the greatest effects on nutrients in streams under different land use scenarios. The experiment database that was compiled could serve as the basis of similar studies in the future. The approach will be beneficial to local community and may easily be applied to other agriculture dominate Midwest regions.
影响因子：
5.2
作者：
Grafius, Darren R.;Corstanje, Ron;Harris, Jim A.
通讯作者：
Harris, Jim A.