Stream thermalscape scenarios for British Columbia, Canada

Water temperature is a key feature of freshwater ecosystems but comprehensive datasets are severely lacking, a limiting factor in research and management of freshwater species and habitats. An existing statistical stream temperature model developed for British Columbia (BC), Canada, was refit to predict August mean stream temperatures, a common index of stream thermal regime also used in thermalscapes developed for the western United States (US). Thermalscapes of predicted August mean stream temperature were produced for 680,000 km of stream network at approximately 400 m intervals. Temperature predictions were averaged for 20-year periods from 1981–2100 to produce 86 scenarios: one for each historical period (i.e., 1981–2000, 2001–2020), and 21 for each future period (i.e., six global climate models and an ensemble average under three representative concentration pathways). The final model performance was consistent with other published regional-scale statistical models (R2 = 0.79, RMS..., Please see Weller et al. (2023) for full methods.
Weller, J.D., R.D. Moore & J.C. Iacarella (2023) Stream thermalscape scenarios for British Columbia, Canada, Canadian Water Resources Journal / Revue canadienne des ressources hydriques, DOI: 10.1080/07011784.2023.2267028, Zipped files (.zip) are stored in an ESRI geodatabase (.gdb) and can be accessed through open-souce GIS software (e.g., QGIS), Data from: Stream Thermalscape Scenarios for British Columbia, Canada, Dryad, Dataset, https://doi.org/10.5061/dryad.bzkh189fk

All thermalscapes (i.e., stream temperature layers) are stored as linear feature classes in 'bc\_stream\_thermalscapes.gdb'.
The geodatabase contains a linear feature class for each major drainage region in British Columbia (BC), Canada, as defined by the BC Freshwater Atlas (FWA).
All feature classes share the same set of attribute fields.

Full details on the development of the stream temperature model ('BC AugTw model') and associated thermalscapes can be found in 'Stream Thermalscape Scenarios for British Columbia, Canada' (Weller et al. 2023).
The thermalscape network is a subset of linear stream network layers from the British Columbia Freshwater Atlas (FWA; information licensed under the Open Government Licence British Columbia):
the network includes only 'main' flow paths, and excludes lakes and reaches draining less than 1km^2.
Linear features and key ...

水温是淡水生态系统的关键特征，但全面的数据集极度匮乏，这成为淡水物种与栖息地研究及管理的限制性因素。
一款此前为加拿大不列颠哥伦比亚省（British Columbia，简称BC）开发的河流水温统计模型，经重新拟合后用于预测8月平均河流水温——这是河流水温情势的常用表征指标，同时也被用于美国西部（United States，简称US）开发的热景观（thermalscapes）研究中。
研究团队以约400米的间隔，为总长68万千米的河网生成了8月平均水温预测热景观。以1981年至2100年的20年时段为周期对水温预测结果进行平均，最终得到86种情景：2种历史时期情景（即1981–2000年、2001–2020年），以及每个未来时期对应的21种情景——即3种典型浓度路径（representative concentration pathways）下，各包含6个全球气候模型结果与1个集合平均结果。
模型最终性能与已发表的其他区域尺度统计模型相当（决定系数R²=0.79，均方根误差……完整方法详见Weller等人（2023）的研究。
Weller、J.D.、R.D. Moore与J.C. Iacarella（2023）《加拿大不列颠哥伦比亚省河流水热景观情景》，《加拿大水资源杂志/Revue canadienne des ressources hydriques》，DOI: 10.1080/07011784.2023.2267028。压缩文件（.zip）存储于ESRI地理数据库（geodatabase）中，可通过开源地理信息系统（GIS）软件（如QGIS）访问。数据集来源：《加拿大不列颠哥伦比亚省河流水热景观情景》，Dryad数据集，https://doi.org/10.5061/dryad.bzkh189fk
所有热景观（即河流水温图层）均以线性要素类的形式存储于`bc_stream_thermalscapes.gdb`地理数据库中。
该地理数据库包含由不列颠哥伦比亚省淡水地图集（BC Freshwater Atlas，简称FWA）定义的加拿大不列颠哥伦比亚省各主要流域的线性要素类。
所有要素类共享同一套属性字段。
关于河流水温模型（‘BC AugTw模型’）及相关热景观的完整开发细节，可参见《加拿大不列颠哥伦比亚省河流水热景观情景》（Weller等人，2023）。
本热景观网络是不列颠哥伦比亚省淡水地图集（FWA；信息根据《不列颠哥伦比亚省政府开放许可》授权）的线性河网图层子集：该网络仅包含‘主要’径流路径，排除湖泊以及汇水面积小于1平方千米的河段。
线性要素与关键……