Data and code for analyses in Lowman et al. 2024, Macroscale controls determine the recovery of river ecosystem productivity following flood disturbances.See publication and ReadMe file for analysis description and further details.

Data and code for analyses in Lowman et al. 2024, Macroscale controls determine the recovery of river ecosystem productivity following flood disturbances.See publication and ReadMe file for analysis description and further details.

These data were compiled to predict hourly Glen Canyon Dam operations and hydropower impacts. The objective of our study was to estimate hydropower impacts under different future LTEMP sEIS alternatives. These data represent hourly outflow in cubic feet per second, generation in megawatt hours, and economic value of hydropower in nominal dollars. These data were created for operations at Glen Canyon Dam for October 2023 through November 2027. These data were created by the U.S. Geological Survey, Southwest Biological Science Center, Grand Canyon Monitoring and Research Cetner using mathematical modeling methods.

These data were compiled for/to modeling efforts for U.S. Bureau of Reclamation National Environmental Policy Act (NEPA) analyses for the Colorado River in Grand Canyon, Arizona. Objective(s) of our study were to create revised monthly Lake Powell elevations and outflows from Bureau of Reclamation Colorado River Mid-term Modeling System (CRMMS) traces that incorporate the alternatives in the sEIS documents and indicate when potential actions may occur and how that changes water movement and storage. These data represent monthly hydrologies for Lake Powell: inflow, outflow, and elevation forecasts for 2024-2027, as well as volumes of water in outflows for different water mangement strategies in NEPA supplemental environmental impact statement (sEIS) documents from the U.S. Bureau of Reclamation (USBOR). These data were collected in 2023 and 2024. These data were collected from the USBOR CRMMS and used by U.S. Geological Survey-Southwest Biological Science Center-Grand Canyon Monitoring & Research Center modeling. These data can be used to evaluate different water management strategy potential impacts to storage in Lake Powell.

These data were compiled to create models that estimate entrainment rates and population growth rates of smallmouth bass below Glen Canyon Dam. Objective(s) of our study were to predict smallmouth bass entrainment rates and population growth under different future scenarios of Lake Powell elevations and management. These data represent parameters needed for associated models and data needed to produce figures. These data were collected from publicly available online sources including published papers and federal government datasets. These data were assembled by researchers from U.S. Geological Survey, Utah State University, Colorado State University, U.S. Fish and Wildlife Service. These data can be used to run models that estimate smallmouth bass entrainment rates through Glen Canyon Dam and smallmouth bass population growth rates in the Colorado River below Glen Canyon Dam.

Dissolved oxygen estimates were generated to help understand how different alternative management scenarios may affect the likelihood of low dissolved oxygen in Glen Canyon Dam releases. The study aimed to examine the effects of different management alternatives on late summer and early fall dissolved oxygen concentrations in Glen Canyon Dam releases. The estimates represent estimates of dissolved oxygen concentration in Glen Canyon Dam releases between August and October of a given year. These estimates were generated using data collected in Lake Powell reservoir as part of a long-term inter-agency water quality monitoring program conducted by the Bureau of Reclamation, the National Park Service, and the U.S. Geological Survey. Specifically, the dissolved oxygen concentration in dam releases was modeled based on alternative hydrologies associated with alternatives under both the Near-term Colorado River Operations Supplemental Environmental Impact Statement (Interim Guidelines sEIS) and the Glen Canyon Dam Long-Term Experimental and Management Plan Supplemental Environmental Impact Statement (LTEMP sEIS). These estimates can be used to examine how different proposed alternative management strategies may affect oxygen concentrations in Glen Canyon Dam releases.

These data were compiled for modeling efforts of Bureau of Reclamation National Environmental Policy Act (NEPA) analyses for the Colorado River in Grand Canyon, Arizona. Objective(s) of our study were to forecast water temperature, smallmouth bass population growth rate, and smallmouth bass entrainment rates under different water management scenarios. These data represent forecasted smallmouth bass entrainment rates and smallmouth bass population growth rates. Data were collected in 2023 and 2024 by the Bureau of Reclamation CRMMS and then used by the U.S. Geological Survey-Southwest Biological Science Center-Grand Canyon Monitoring & Research Center in the modeling process. These data can be used to evaluate different water management strategy potential impacts on smallmouth bass.

These data were compiled to fit Bayesian state-space growth in length models to estimate the environmental variables that influence flannelmouth sucker growth rates in the Grand Canyon. Objective(s) of our study were to quantify monthly intervals of growth of flannelmouth suckers in four river reaches, and test if novel high frequency gross primary productivity data would be a significant predictor of fish growth. These data represent capture histories for flannelmouth sucker (Catostomus latippinis) in the mainstem of the Colorado River within the Grand Canyon (river mile 0 to 226) from 2012-2018 and environmental variable data including water temperature, turbidity, and gross primary productivity. Fish data refer to fish length (>150mm fork length), month of capture and spatial location for captures of flannelmouth sucker. These data were collected in the segment of the Colorado River that is within the Grand Canyon, Arizona, between April 2012 to October 2018. Mean monthly water temperature and turbidity data were collected at USGS stream gages at four locations on the Colorado River, and mean monthly gross primary productivity data was collected daily via four Yellow Springs Instrument (YSI) sonds at the same four locations as the stream gages. These data were collected by US Geological Survey, US Fish & Wildlife Service, National Parks Service and Arizona Department of Game and Fish, with funding from the Bureau of Reclamation. Fish data were collected using boat electrofishing and hoop nets, and environmental data was obtained from USGS stream gages. These data can be used to look at spatial and temporal variations in flannelmouth sucker growth.

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.

These data were compiled for a manuscript entitled 'Vital rates of a burgeoning population of Humpback Chub in western Grand Canyon. Objective(s) of our study were to compare survival and growth of humpback chub in western Grand Canyon to that from the more established metapopulation in eastern Grand Canyon that spawns in the Little Colorado River (LCR). These data represent capture histories of fish based on mark-recapture data. These data were collected in eastern Grand Canyon (CR-east study site) and in the western Grand Canyon (CR-west study site). The CR-east reach sites are located at the lower 13.56 rkm of the LCR and in the mainstem of the Colorado River at river kilometers (rkm) 126.2-128.7 (2009-2016) and was expanded to rkm 125-130.4 in 2017-2022, and the CR-west site is located 363-368.5 river kilometers downstream of Glen Canyon Dam. For the Von Bertalanffy growth analysis, data were collected from 330-410 rkm downstream of Glen Canyon Dam for capture histories and growth data, respectively. These data were collected by the Grand Canyon Monitoring and Research Center (U.S. Geological Survey-Southwest Biological Science Center) and U.S. Fish and Wildlife Service. Fish were implanted with passive integrated transponder (PIT) tags that allowed for individual identification upon future recapture and these data allow us to construct capture histories for individual fish and fit mark-recapture models. These data can be used to estimate survival, growth, abundance, and movement of humpback chub in eastern and western Grand Canyon.