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The Klamath River Basin is typically divided into two regions: The Upper Klamath River Basin and Lower Klamath River Basin. The Upper Klamath River Basin drains all catchments above the former Iron Gate Dam (lowest former dam on the Klamath River) in California. Located in the rain shadow on the eastern side of the Cascade Mountain Range, the Upper Klamath River\r\nBasin has an arid climate. The Upper Klamath River Basin features Oregon\u2019s largest natural lake by surface area\u2014Upper Klamath Lake\u2014and relatively high urban and agricultural development. In contrast, the Lower Klamath River Basin, which is in the Pacific Coastal Range and encompasses the watershed downstream of former Iron Gate Dam, receives more precipitation than the Upper Klamath River Basin. The Lower Klamath River Basin encompasses large areas of northern California and Pacific Northwest conifers and hardwoods. The Lower Klamath River\r\nBasin has no major natural lakes and less urban and agricultural development than in the Upper Klamath River Basin.", "locationStatusId":1, "elevation":null, "createDate":"2023-07-10T21:54:00+00:00", "updateDate":"2025-11-20T22:52:39+00:00", "horizontalDatum":{ "_id":"WGS84", "definition":"World Geodetic System of 1984" }, "timezone":null, "verticalDatum":null, "locationTags":[ { "id":325, "tag":"Klamath Basin", "createDate":"2021-09-13T23:43:28+00:00" } ], "relatedLocationIds":null, "projectNames":[ "Klamath Project" ], "locationTypeName":"Watershed/Basin", "timezoneName":null, "timezoneOffset":null, "locationRegionNames":[ "Mid-Pacific" ], "locationUnifiedRegionNames":[ "California-Great Basin" ], "catalogItems":[ { "id":"/rise/api/catalog-record/8500", "attributes":{ "_id":8500, "recordTitle":"Upper Klamath River Basin Open Water Evaporation Modeling Report and Data from the Klamath River Basin Revised Natural Flow Study", "recordDescription":"As part of the Klamath River Basin Revised Natural Flow Study, the Daily Lake Evaporation Model was used to simulate daily open water evaporation on water bodies throughout the Upper Klamath River Basin. Modeling methodology, results, and analysis are documented in a technical memorandum. Daily evaporation rates and volumes were estimated for all large waterbodies in the upper Klamath River Basin that have significantly changed between pre-development and water years (WY) 1981\u2013WY 2020. A large effort was made to quantify the uncertainties related to the estimated evaporation rates and volumes which arose from biases in forcing data and unknown waterbody mean depths. The overarching purpose of the Klamath River Basin Revised Natural Flow Study is to apply current science, methods, and tools to develop natural streamflow estimates, while addressing known limitations of previous estimates and incorporating recommendations provided by the National Research Council. The natural streamflow estimates may be used for habitat suitability studies, drought planning, streamflow forecasting, water operations studies, and other water resource investigations. Furthermore, this study provides numerical modeling tools that can be used for future assessments.", "catalogStatusId":1, "metadataFilePath":null, "metadataStandard":{ "_id":"ISO", "definition":"International Standards Organization (ISO) 19115-1:2014 metadata content standard, and ISO 19139:2007 metadata implementation standard", "createDate":"2018-11-20T13:25:52+00:00" }, "createDate":"2025-09-15T18:11:31+00:00", "updateDate":"2025-11-21T15:30:58+00:00", "programNames":[], "generationEffort":"Klamath River Basin Revised Natural Flow Study", "generationEffortId":477, "subTheme":{ "_id":52, "subTheme":"Hydrology", "definition":"Related to the study of the distribution and movement of water both on and below the Earth's surface, as well as the impact of human activity on water availability and conditions.", "createDate":"2021-12-17T18:24:19+00:00" }, "tags":[ "Modeling", "Natural Flow Study", "Open Water Evaporation", "Pre-Development" ], "themes":[ "Water" ] }, "type":"CatalogRecord", "relationships":{ "location":{ "data":[ { "id":"/rise/api/location/6870", "type":"Location" } ] }, "catalogItems":{ "data":[ { "id":"/rise/api/catalog-item/133810", "type":"CatalogItem" }, { "id":"/rise/api/catalog-item/133811", "type":"CatalogItem" } ] } } }, { "id":"/rise/api/catalog-item/133810", "attributes":{ "_id":133810, "itemTitle":"Technical Memorandum ENV-2025-051: Upper Klamath River Basin Open Water Evaporation Modeling Report from the Klamath River Basin Revised Natural Flow Study", "itemDescription":"This Technical Memorandum focuses on the development of daily open water evaporation rates and volumes from 13 lakes and reservoirs in the Klamath River Basin that have changed between predevelopment and current conditions. Daily evaporation rates and volumes were estimated for all large waterbodies in the upper Klamath River Basin that have significantly changed between pre-development and water years (WY) 1981\u2013WY 2020. A large effort was made to quantify the uncertainties related to the estimated evaporation rates and volumes which arose from biases in forcing data and unknown waterbody mean depths. The largest source of uncertainty was the unknown fluctuations in pre-development water surface elevations as the uncertainty due to forcing data biases was greatly reduced through bias correction of the gridMET climate data. Results suggest that while evaporation rates were similar during WY 1981\u20132020 and pre-development conditions, annual mean pre-development evaporation volumes were 36 to 87 percent higher than current conditions volumes. Approximately 161 to 339 TAF more evaporation occurred annually under pre-development conditions than occurred from WY 1981\u20132020. This is primarily due to the drainage of pre-development large shallow lakes with high evaporation volumes. The modeling data associated with this report is available at https://data.usbr.gov/catalog/8500/item/133811. This work is part of a larger effort, the Klamath River Basin Revised Natural Flow Study. This study combines seven different hydrologic modeling tools to develop natural streamflow estimates for the Klamath River Basin from WY 1981 through WY 2020. The overarching purpose of the study is to apply current science, methods, and tools to develop natural streamflow estimates, while addressing known limitations of previous estimate and incorporating recommendations provided by the National Research Council.", "itemRecordStatusId":1, "isModeled":false, "hasProfile":false, "disclaimer":"The Bureau of Reclamation assumes no responsibility or liability for any errors or omissions in the content of this data. The information contained in this data is provided on an \"as is\" basis with no guarantees of completeness, accuracy, usefulness or timeliness and without any warranties of any kind whatsoever, express or implied. The Bureau of Reclamation does not warrant that this data and any information or material downloaded from the data, will be uninterrupted, error-free, omission-free or free of virus or other harmful items.", "sourceCode":null, "locationSourceCode":null, "externalDataUrl":null, "parameterSourceCode":null, "modelNameSourceCode":null, "temporalStartDate":null, "temporalEndDate":null, "spatialShortDescription":null, "publicationAuthor":"Kristin Mikkelson", "publicationEditor":null, "publicationPublisher":"Bureau of Reclamation", "publicationPublisherLocation":"Denver, CO, USA", "publicationFirstPublicationDate":"2025-09-01T12:00:00+00:00", "publicationPeriodicalName":null, "publicationSerialNumber":null, "publicationDoi":null, "publicationVolume":null, "publicationIssue":null, "publicationSection":null, "publicationStartPage":null, "publicationEndPage":null, "createDate":"2025-09-15T18:16:39+00:00", "itemType":{ "_id":"RPRT", "definition":"Report", "createDate":"2018-11-28T14:19:59+00:00" }, "matrix":{ "_id":16, "matrix":"Surface Water", "definition":"Untreated water that is present on the land surface, within natural or man-made catchments, channels, or pipes.", "createDate":"2018-11-20T09:34:56+00:00" }, "spatialGeometry":null, "spatialResolution":null, "spatialTransformation":null, "spatialOpenDataURL":null, "metadataFilePath":null, "binaryFilePath":"https://data.usbr.gov/rise/content-rise-public/rise/catalog-item/binary/KlamathBasinRevisedNFS_OpenWaterEvaporation_2025Sept.pdf", "updateFrequency":{ "_id":14, "updatefrequency":"not planned", "definition":"there are no plans to update the data", "createDate":"2018-11-14T15:17:58+00:00" }, "updateDate":"2025-11-20T23:06:00+00:00", "verticalDatum":null, "dataStructure":"Uploaded file(s)", "itemStructureId":3, "parameterGroup":null, "parameterId":null, "parameterName":null, "parameterUnit":null, "parameterTimestep":null, "parameterTransformation":null }, "type":"CatalogItem", "relationships":{ "catalogRecord":{ "data":[ { "id":"/rise/api/catalog-record/8500", "type":"CatalogRecord" } ] }, "parameter":{ "data":[] } } }, { "id":"/rise/api/catalog-item/133811", "attributes":{ "_id":133811, "itemTitle":"Upper Klamath River Basin Open Water Evaporation Modeling Data from the Klamath River Basin Revised Natural Flow Study", "itemDescription":"The Daily Lake Evaporation Model (DLEM) was used to develop evaporation rates for 13 lakes and reservoirs in the Klamath River Basin that have changed between predevelopment and current conditions. All model files can be found in the model zip package. Please see the associated README file for directions to run the models and explanations of model output. To see the report associated with this dataset, please visit https://data.usbr.gov/catalog/8500/item/133810. The model files and associated report are part of a larger effort, the Klamath River Basin Revised Natural Flow Study. This study combines seven different hydrologic modeling tools to develop natural streamflow estimates for the Klamath River Basin from WY 1981 through WY 2020. The overarching purpose of the study is to apply current science, methods, and tools to develop natural streamflow estimates, while addressing known limitations of previous estimate and incorporating recommendations provided by the National Research Council.", "itemRecordStatusId":1, "isModeled":false, "hasProfile":false, "disclaimer":"The Bureau of Reclamation assumes no responsibility or liability for any errors or omissions in the content of this data. The information contained in this data is provided on an \"as is\" basis with no guarantees of completeness, accuracy, usefulness or timeliness and without any warranties of any kind whatsoever, express or implied. The Bureau of Reclamation does not warrant that this data and any information or material downloaded from the data, will be uninterrupted, error-free, omission-free or free of virus or other harmful items.", "sourceCode":null, "locationSourceCode":null, "externalDataUrl":null, "parameterSourceCode":null, "modelNameSourceCode":null, "temporalStartDate":null, "temporalEndDate":null, "spatialShortDescription":null, "publicationAuthor":"Kristin Mikkelson", "publicationEditor":null, "publicationPublisher":"Bureau of Reclamation", "publicationPublisherLocation":"Denver, CO, USA", "publicationFirstPublicationDate":"2025-09-01T12:00:00+00:00", "publicationPeriodicalName":null, "publicationSerialNumber":null, "publicationDoi":null, "publicationVolume":null, "publicationIssue":null, "publicationSection":null, "publicationStartPage":null, "publicationEndPage":null, "createDate":"2025-09-15T18:19:42+00:00", "itemType":{ "_id":"DATA", "definition":"Data file", "createDate":"2018-11-28T14:19:59+00:00" }, "matrix":{ "_id":16, "matrix":"Surface Water", "definition":"Untreated water that is present on the land surface, within natural or man-made catchments, channels, or pipes.", "createDate":"2018-11-20T09:34:56+00:00" }, "spatialGeometry":null, "spatialResolution":null, "spatialTransformation":null, "spatialOpenDataURL":null, "metadataFilePath":null, "binaryFilePath":"https://data.usbr.gov/rise/content-rise-public/rise/catalog-item/binary/KlamathBasinRevisedNFS_OpenWaterEvap_DLEMModelPackage_2025Sept.zip", "updateFrequency":{ "_id":14, "updatefrequency":"not planned", "definition":"there are no plans to update the data", "createDate":"2018-11-14T15:17:58+00:00" }, "updateDate":"2025-11-20T23:06:20+00:00", "verticalDatum":null, "dataStructure":"Uploaded file(s)", "itemStructureId":3, "parameterGroup":null, "parameterId":null, "parameterName":null, "parameterUnit":null, "parameterTimestep":null, "parameterTransformation":null }, "type":"CatalogItem", "relationships":{ "catalogRecord":{ "data":[ { "id":"/rise/api/catalog-record/8500", "type":"CatalogRecord" } ] }, "parameter":{ "data":[] } } }, { "id":"/rise/api/catalog-record/8528", "attributes":{ "_id":8528, "recordTitle":"Upper Klamath River Basin Surface Water Hydraulic Modeling Report and Data from the Klamath River Basin Revised Natural Flow Study", "recordDescription":"This Record documents the hydraulic analyses conducted in support of the Klamath River Basin Revised Natural Flow Study. Components of the hydraulic analyses needed for the prediction of daily streamflow estimates include the surficial movement and storage of water across the landscape. Methods and results presented include: (1) area-capacity relationships for Upper Klamath, Lower Klamath, and Tule Lakes, (2) rating curves (relationships between water surface elevation and discharge) at the downstream hydraulic control of Upper Klamath Lake under 1981\u20132020 and pre-development conditions, and (3) pre-development streamflow losses through the Lost River Slough and streamflow exchanges with Lower Klamath Lake. Results within the report can be used to aid in calculation of daily streamflow. Surficial water area and storage have decreased greatly from pre-development to 1981\u20132020 conditions. Modeling of the hydraulic control at Upper Klamath Lake indicates that pre-development water surface elevations as compared to 1981\u20132020 conditions would be higher at low streamflow and lower at high streamflow. Finally, pre-development modeling between Link River and Keno, Oregon indicates that the Klamath River diverted a portion of streamflow through the Lost River Slough to Tule Lake at flood discharges. The results presented within the report were delivered to RiverWare as look-up tables to aid in the calculation of daily streamflow. The hydraulic models and topobathymetric data are also included. The Natural Flow Study was undertaken to better understand the complex Upper Klamath River Basin and inform future management strategies. To develop daily streamflow estimates, the Natural Flow Study is using a variety of methods and models to simulate different parts of the water budget including hydraulic analyses. Results from all methodologies and modeling of each portion of the water budget will be compiled within a RiverWare model to estimate daily natural streamflow under 1981\u20132020 and pre-development conditions.", "catalogStatusId":1, "metadataFilePath":null, "metadataStandard":{ "_id":"ISO", "definition":"International Standards Organization (ISO) 19115-1:2014 metadata content standard, and ISO 19139:2007 metadata implementation standard", "createDate":"2018-11-20T13:25:52+00:00" }, "createDate":"2025-11-03T17:05:22+00:00", "updateDate":"2025-12-01T19:29:57+00:00", "programNames":[], "generationEffort":"Klamath River Basin Revised Natural Flow Study", "generationEffortId":477, "subTheme":{ "_id":52, "subTheme":"Hydrology", "definition":"Related to the study of the distribution and movement of water both on and below the Earth's surface, as well as the impact of human activity on water availability and conditions.", "createDate":"2021-12-17T18:24:19+00:00" }, "tags":[ "Modeling", "Surface Water", "Natural Flow Study" ], "themes":[ "Water" ] }, "type":"CatalogRecord", "relationships":{ "location":{ "data":[ { "id":"/rise/api/location/6870", "type":"Location" } ] }, "catalogItems":{ "data":[ { "id":"/rise/api/catalog-item/133876", "type":"CatalogItem" }, { "id":"/rise/api/catalog-item/133877", "type":"CatalogItem" }, { "id":"/rise/api/catalog-item/133878", "type":"CatalogItem" } ] } } }, { "id":"/rise/api/catalog-item/133876", "attributes":{ "_id":133876, "itemTitle":"Technical Memorandum No. ENV-2025-074: Upper Klamath River Basin Surface Water Hydraulic Modeling Report from the Klamath River Basin Revised Natural Flow Study", "itemDescription":"This report documents the hydraulic analyses conducted in support of the broader Klamath Natural Flow Study. Components of the hydraulic analyses needed for the prediction of daily streamflow estimates include the surficial movement and storage of water across the landscape. Methods and results presented here include: (1) area-capacity relationships for Upper Klamath, Lower Klamath, and Tule Lakes, (2) rating curves (relationships between water surface elevation and discharge) at the downstream hydraulic control of Upper Klamath Lake under 1981\u20132020 and pre-development conditions, and (3) pre-development streamflow losses through the Lost River Slough and streamflow exchanges with Lower Klamath Lake. Results within this report are not actual daily predictions, but information to be used to calculate daily streamflow. Regarding water storage, surficial water area and storage have decreased greatly from pre-development to 1981\u20132020 conditions. The modeling of the hydraulic control at Upper Klamath Lake indicates that pre-development water surface elevations as compared to 1981\u20132020 conditions would be higher at low streamflow and lower at high streamflow. Finally, pre-development modeling between Link River and Keno, Oregon indicates that the Klamath River only diverted a portion of streamflow through the Lost River Slough to Tule Lake at flood discharges. The connection of the Klamath River with Lower Klamath Lake was dynamic and bi-directional, but streamflow exchanges were likely relatively small due to the self-regulating negative feedback preventing extreme streamflow exchanges in either direction. The results presented within this report were delivered to RiverWare as look-up tables to aid in the calculation of daily streamflow.", "itemRecordStatusId":1, "isModeled":false, "hasProfile":false, "disclaimer":"The Bureau of Reclamation assumes no responsibility or liability for any errors or omissions in the content of this data. The information contained in this data is provided on an \"as is\" basis with no guarantees of completeness, accuracy, usefulness or timeliness and without any warranties of any kind whatsoever, express or implied. The Bureau of Reclamation does not warrant that this data and any information or material downloaded from the data, will be uninterrupted, error-free, omission-free or free of virus or other harmful items.", "sourceCode":null, "locationSourceCode":null, "externalDataUrl":null, "parameterSourceCode":null, "modelNameSourceCode":null, "temporalStartDate":null, "temporalEndDate":null, "spatialShortDescription":null, "publicationAuthor":"Colin F. Byrne, Aaron A. Hurst", "publicationEditor":null, "publicationPublisher":"Bureau of Reclamation", "publicationPublisherLocation":"Denver, CO, USA", "publicationFirstPublicationDate":"2025-09-01T12:00:00+00:00", "publicationPeriodicalName":null, "publicationSerialNumber":null, "publicationDoi":null, "publicationVolume":null, "publicationIssue":null, "publicationSection":null, "publicationStartPage":null, "publicationEndPage":null, "createDate":"2025-11-03T17:16:30+00:00", "itemType":{ "_id":"RPRT", "definition":"Report", "createDate":"2018-11-28T14:19:59+00:00" }, "matrix":{ "_id":16, "matrix":"Surface Water", "definition":"Untreated water that is present on the land surface, within natural or man-made catchments, channels, or pipes.", "createDate":"2018-11-20T09:34:56+00:00" }, "spatialGeometry":null, "spatialResolution":null, "spatialTransformation":null, "spatialOpenDataURL":null, "metadataFilePath":null, "binaryFilePath":"https://data.usbr.gov/rise/content-rise-public/rise/catalog-item/binary/KlamathBasinRevisedNFS_SurfaceWaterHydraulicModeling_2025Sept.pdf", "updateFrequency":{ "_id":14, "updatefrequency":"not planned", "definition":"there are no plans to update the data", "createDate":"2018-11-14T15:17:58+00:00" }, "updateDate":"2025-12-01T19:46:25+00:00", "verticalDatum":null, "dataStructure":"Uploaded file(s)", "itemStructureId":3, "parameterGroup":null, "parameterId":null, "parameterName":null, "parameterUnit":null, "parameterTimestep":null, "parameterTransformation":null }, "type":"CatalogItem", "relationships":{ "catalogRecord":{ "data":[ { "id":"/rise/api/catalog-record/8528", "type":"CatalogRecord" } ] }, "parameter":{ "data":[] } } }, { "id":"/rise/api/catalog-item/133877", "attributes":{ "_id":133877, "itemTitle":"Upper Klamath River Basin Surface Water Hydraulic Modeling Data from the Klamath River Basin Revised Natural Flow Study", "itemDescription":"The hydraulics component of the Klamath River Basin Revised Natural Flow Study focused on locations within the Klamath River Basin that are important to water storage and surficial exchange with other portions of the basin that may impact Klamath River streamflow. Key hydraulics components include area-capacity curves, lateral hydraulic connectivity, and engineered and natural hydraulic controls. These data detail the hydraulic modeling and topographic analyses that were used to inform the RiverWare mass balance modeling and natural streamflow estimates. Primarily those analyses include development of area-capacity (ACAP) relationships and hydraulic models that inform how water flows across certain locations of the landscape using rating curves and flow exchange relationships. Lakes and reservoirs where ACAP relationships were developed in Upper Klamath River Basin include Upper Klamath Lake, Lower Klamath Lake, and Tule Lake as well as inclusion of existing ACAP relationships at Rogue River basin reservoirs, PacifiCorp reservoirs, Gerber Reservoir, and Clear Lake. Reclamation developed hydraulic models at two main locations in the Upper Klamath River Basin: (1) from the downstream end of Upper Klamath Lake through the Link River; and (2) along the Klamath River reach between the Link River and Keno Dam. Predictions were developed using the Sedimentation and River Hydraulics \u2013 Two-Dimensional model. The Upper Klamath Lake products are rating curves that relate water surface elevation to a paired discharge flowing out of the lake for both 1981 to 2020 and pre-development conditions. The Link River to Keno pre-development modeling included results of flow exchange between the Klamath River and Lower Klamath Lake, as well as flow losses from the Klamath River to the Lost River Slough. This zip file contains hydraulic modeling data. To see the report associated with this dataset, please visit https://data.usbr.gov/catalog/8528/item/133876.", "itemRecordStatusId":1, "isModeled":false, "hasProfile":false, "disclaimer":"The Bureau of Reclamation assumes no responsibility or liability for any errors or omissions in the content of this data. The information contained in this data is provided on an \"as is\" basis with no guarantees of completeness, accuracy, usefulness or timeliness and without any warranties of any kind whatsoever, express or implied. The Bureau of Reclamation does not warrant that this data and any information or material downloaded from the data, will be uninterrupted, error-free, omission-free or free of virus or other harmful items.", "sourceCode":null, "locationSourceCode":null, "externalDataUrl":null, "parameterSourceCode":null, "modelNameSourceCode":null, "temporalStartDate":null, "temporalEndDate":null, "spatialShortDescription":null, "publicationAuthor":"Colin F. Byrne, Aaron A. Hurst", "publicationEditor":null, "publicationPublisher":"Bureau of Reclamation", "publicationPublisherLocation":"Denver, CO, USA", "publicationFirstPublicationDate":"2025-09-01T12:00:00+00:00", "publicationPeriodicalName":null, "publicationSerialNumber":null, "publicationDoi":null, "publicationVolume":null, "publicationIssue":null, "publicationSection":null, "publicationStartPage":null, "publicationEndPage":null, "createDate":"2025-11-03T17:32:50+00:00", "itemType":{ "_id":"DATA", "definition":"Data file", "createDate":"2018-11-28T14:19:59+00:00" }, "matrix":{ "_id":16, "matrix":"Surface Water", "definition":"Untreated water that is present on the land surface, within natural or man-made catchments, channels, or pipes.", "createDate":"2018-11-20T09:34:56+00:00" }, "spatialGeometry":null, "spatialResolution":null, "spatialTransformation":null, "spatialOpenDataURL":null, "metadataFilePath":null, "binaryFilePath":"https://data.usbr.gov/rise/content-rise-public/rise/catalog-item/binary/KlamathBasinRevisedNFS_HydraulicModel_ModelingData_2025Sept_0.zip", "updateFrequency":{ "_id":14, "updatefrequency":"not planned", "definition":"there are no plans to update the data", "createDate":"2018-11-14T15:17:58+00:00" }, "updateDate":"2025-12-01T19:30:29+00:00", "verticalDatum":null, "dataStructure":"Uploaded file(s)", "itemStructureId":3, "parameterGroup":null, "parameterId":null, "parameterName":null, "parameterUnit":null, "parameterTimestep":null, "parameterTransformation":null }, "type":"CatalogItem", "relationships":{ "catalogRecord":{ "data":[ { "id":"/rise/api/catalog-record/8528", "type":"CatalogRecord" } ] }, "parameter":{ "data":[] } } }, { "id":"/rise/api/catalog-item/133878", "attributes":{ "_id":133878, "itemTitle":"Upper Klamath River Basin Surface Water Hydraulic Modeling Topobathymetric Data from the Klamath River Basin Revised Natural Flow Study", "itemDescription":"Topobathymetry was an integral portion of the hydraulics component of the Klamath River Basin Revised Natural Flow Study. Important hydraulic locations in the Upper Klamath River Basin often are aligned with natural bedrock reefs that acted as hydraulic controls and were highly influential in altering storage and streamflow conditions in a pre-development condition. In 1981-2020 conditions, there are often dams or other hydraulic structures at many key locations. In pre-development conditions, there were also flow paths that have since been disconnected from the Klamath River. Three critical pre-development topobathymetric surfaces were created for the hydraulics components analyses in and surrounding the following three locations: Upper Klamath Lake, the Klamath River-Lost River Slough-Lower Klamath Lake system, and Tule Lake. This zip file contains topobathymetric data. To see the report associated with this dataset, please visit https://data.usbr.gov/catalog/8528/item/133876.", "itemRecordStatusId":1, "isModeled":false, "hasProfile":false, "disclaimer":"The Bureau of Reclamation assumes no responsibility or liability for any errors or omissions in the content of this data. The information contained in this data is provided on an \"as is\" basis with no guarantees of completeness, accuracy, usefulness or timeliness and without any warranties of any kind whatsoever, express or implied. The Bureau of Reclamation does not warrant that this data and any information or material downloaded from the data, will be uninterrupted, error-free, omission-free or free of virus or other harmful items.", "sourceCode":null, "locationSourceCode":null, "externalDataUrl":null, "parameterSourceCode":null, "modelNameSourceCode":null, "temporalStartDate":null, "temporalEndDate":null, "spatialShortDescription":null, "publicationAuthor":"Colin F. Byrne, Aaron A. Hurst", "publicationEditor":null, "publicationPublisher":"Bureau of Reclamation", "publicationPublisherLocation":"Denver, CO, USA", "publicationFirstPublicationDate":"2025-09-01T12:00:00+00:00", "publicationPeriodicalName":null, "publicationSerialNumber":null, "publicationDoi":null, "publicationVolume":null, "publicationIssue":null, "publicationSection":null, "publicationStartPage":null, "publicationEndPage":null, "createDate":"2025-11-03T17:44:55+00:00", "itemType":{ "_id":"DATA", "definition":"Data file", "createDate":"2018-11-28T14:19:59+00:00" }, "matrix":{ "_id":59, "matrix":"Landforms", "definition":"Features on the Earth's surface that make up the terrain such as mountains, valleys, plains, plateaus, peninsulas and bays. 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