Discharge and water temperature data, Lake Powell thermal profiles, and Annual Thermal Units used to assess reintroduction feasibility of Colorado pikeminnow (Ptychocheilus lucius) in the Colorado River in Grand Canyon

These data were compiled to assess the physical attributes of the Colorado River and its tributaries in Grand Canyon, including discharge, water temperature, Annual Thermal Units, and the potential future thermal regime of the river due to climate change. The objective of our study was to assess whether this river reach could support various life stages of Colorado pikeminnow (Ptychocheilus lucius). These data represent discharge and water temperature in the river segment between Glen Canyon Dam and the Lake Mead inflow, as well as data from Lake Powell that drive water temperatures in Grand Canyon. These data were collected in the Colorado River in Grand Canyon from 1/1/1950 to 9/8/2021. These data were collected by the U.S. Geological Survey (discharge, water temperature, Lake Powell thermal profiles) and the Bureau of Reclamation (Lake Powell thermal profiles, reservoir surface elevation). These data were collected via field observation or by USGS stream gages. These data can be used to understand how discharge, water temperature, and changes in the elevation of Lake Powell affect the physical attributes of the river downstream from Glen Canyon Dam in order to evaluate habitat suitability of the reach for Colorado pikeminnow.

本数据集旨在评估大峡谷（Grand Canyon）内科罗拉多河（Colorado River）及其支流的物理属性，涵盖流量（discharge）、水温（water temperature）、年度热单位（Annual Thermal Units），以及气候变化驱动下该河流未来潜在的热状况（thermal regime）。本研究的核心目标为评估该河段是否可支撑科罗拉多钝口雅罗鱼（Ptychocheilus lucius）的各个生命阶段。本数据集包含格伦峡谷大坝（Glen Canyon Dam）至米德湖（Lake Mead）入水口河段的流量与水温数据，以及影响大峡谷内河流水温的鲍威尔湖（Lake Powell）相关数据。数据采集时段为1950年1月1日至2021年9月8日，采集区域为大峡谷内的科罗拉多河段。数据由美国地质调查局（U.S. Geological Survey，USGS）采集（采集内容含流量、水温、鲍威尔湖热剖面），同时由垦务局（Bureau of Reclamation）采集鲍威尔湖热剖面与水库水面高程（reservoir surface elevation）。数据获取方式包括野外观测与USGS水文测站监测。本数据集可用于分析流量、水温及鲍威尔湖水位变化对格伦峡谷大坝下游河段物理属性的影响，从而评估该河段对科罗拉多钝口雅罗鱼的栖息地适宜性。