期刊
JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION
卷 52, 期 6, 页码 1347-1365出版社
WILEY
DOI: 10.1111/1752-1688.12461
关键词
biogeochemistry; environmental impacts; lakes; rivers/streams; monitoring; statistics; environmental sampling; nutrients; sediment; eutrophication; total load
资金
- USDA Forest Service under the Southern Nevada Public Land Management Act [13-DG-11272170-009]
Since 1980, the Lake Tahoe Interagency Monitoring Program (LTIMP) has provided streamdischarge and water quality data-nitrogen (N), phosphorus (P), and suspended sediment-at more than 20 stations in Lake Tahoe Basin streams. To characterize the temporal and spatial patterns in nutrient and sediment loading to the lake, and improve the usefulness of the program and the existing database, we have (1) identified and corrected for sources of bias in the water quality database; (2) generated synthetic datasets for sediments and nutrients, and resampled to compare the accuracy and precision of different load calculation models; (3) using the best models, recalculated total annual loads over the period of record; (4) regressed total loads against total annual and annual maximum daily discharge, and tested for time trends in the residuals; (5) compared loads for different forms of N and P; and (6) tested constituent loads against land use-land cover (LULC) variables using multiple regression. The results show (1) N and P loads are dominated by organic N and particulate P; (2) there are significant long-term downward trends in some constituent loads of some streams; and (3) anthropogenic impervious surface is the most important LULC variable influencing water quality in basin streams. Many of our recommendations for changes in water quality monitoring and load calculation methods have been adopted by the LTIMP.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据