A Spatially Distributed Investigation of Stream Water Temperature in a Contemporary Mixed-Land-Use Watershed
A Spatially Distributed Investigation of Stream Water Temperature in a Contemporary Mixed-Land-Use Watershed
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DOI：
10.3390/w12061756
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发表时间：
2020-06-01
期刊：
影响因子：
3.4
通讯作者：
Hubbart, Jason A.
中科院分区：
文献类型：
--
作者：
Horne, Jason P.;Hubbart, Jason A.
河水温度（摄氏度）是影响许多生物和非生物水质过程的重要物理变量。混合镶嵌的土地利用/土地覆盖（LULC）类型和相应的变化，在当代混合土地利用流域的溪流水温（Tw）过程中，需要研究，以推进管理和政策决策。水温进行了分析，从21个测量站点使用嵌套规模的实验流域研究设计。结果表明，林地利用呈负相关（α = 0.05）与平均和最大Tw。农业土地利用显着正相关（α = 0.05），最大Tw除了在春季。混合发展和Tw显着相关（α = 0.05），在季度和每月的时间尺度。某些河段的相关趋势在冬、夏季之间是相反的，与以往的研究相矛盾。在冬季，混合发展表现出负相关的最小Tw和平均Tw。在夏季，较高的最小值，最大值和平均Tw的相关性进行了观察。通过这一高分辨率调查产生的深入了解提高了土地管理者改善当代流域淡水水生生态系统保护战略的能力。
Stream water temperature (degrees C) is an important physical variable that influences many biological and abiotic water quality processes. The intermingled mosaic of land-use/land-cover (LULC) types and corresponding variability in stream water temperature (Tw) processes in contemporary mixed-land-use watersheds necessitate research to advance management and policy decisions. Water temperature was analyzed from 21 gauging sites using a nested-scale experimental watershed study design. Results showed that forested land use was negatively correlated (alpha = 0.05) with mean and maximum Tw. Agricultural land use was significantly positively correlated (alpha = 0.05) with maximum Tw except during the spring season. Mixed development and Tw were significantly correlated (alpha = 0.05) at quarterly and monthly timescales. Correlation trends in some reaches were reversed between the winter and summer seasons, contradicting previous research. During the winter season, mixed development showed a negative relationship with minimum Tw and mean Tw. During the summer season, higher minimum, maximum, and mean Tw correlations were observed. Advanced understanding generated through this high-resolution investigation improves land managers' ability to improve conservation strategies in freshwater aquatic ecosystems of contemporary watersheds.