Percent Decrease in Mean Summer (Low) Flows in Lower Fish Creek Watershed - Historic to 2040s
Subset of the VIC streamflow projection data corresponding to the Box 3.1 travel analysis case study found in the Southwest Oregon Climate Change Vulnerability Assessment. Methods:Climate induced changes in mean summer flow were estimated using the Variable Infiltration Capacity Model (VIC) (Liang et al., 1994), which calculates snow accumulation and melt, runoff generation, and evaporation on large grid cells (1/16thdegree) using elevation bands and discretization across vegetation types to describe the heterogeneity within cells. The data used in this assessment is derived from VIC projections at https://cig.uw.edu/datasets/wus/. The runoff and baseflow generated within VIC cells was apportioned to streams in the 1:100,000 scale NHDPlus V2 database (http://www.horizon-systems.com/NHDPlus/NHDPlusV2_home.php) based on fractional contributions in each catchment following Wenger et al.,(2010). The VIC model was calibrated to large watersheds, and although the groundwater parameters are some of the most important to VIC’s calibration (Matheussen et al.,2000), the large calibration units do little to inform local watershed groundwater behavior. We modified the catchment scale routing process used by Wenger et al.,(2010) to account for local information on groundwater storage and discharge based on the calibrations of Safeeq et al.,(2013; 2014). Specifically, the recession constant, k, calibrated in that work was applied to generate a unit hydrograph routing kernel by each unit for which k was calibrated. The groundwater recession properties explained in Tague and Grant(2009) and Safeeq et al.,(2013; 2014) are fully consistent with the unit hydrograph approach; so the k estimates from the long summer recessions are appropriate for direct application. Mathematically, each day’s runoff from VIC was apportioned outflow timing based on each basin’s k value, and the flow apportionments from each preceding day were summed to obtain the current day’s streamflow. Data:Dataset provided includes a file for the historical period, the 2040s, and the 2080s. Each file contains two fields:COMID: a unique identifier in the NHDPlus V2 dataset that associates the metrics with stream segmentsMS_xxxx: Mean Summer flow for each period, where ‘xxxx’ denotes the time period. Mean Summer flow was calculated from the hydrographs for each stream segment as the mean flow between June 1 and September 30 for each time period. Units: cubic feet per second
[{'name': 'OBJECTID', 'type': 'esriFieldTypeOID', 'alias': 'OBJECTID', 'sqlType': 'sqlTypeOther', 'nullable': False, 'editable': False, 'domain': None, 'defaultValue': None}, {'name': 'COMID', 'type': 'esriFieldTypeInteger', 'alias': 'COMID', 'sqlType': 'sqlTypeOther', 'nullable': True, 'editable': True, 'domain': None, 'defaultValue': None}, {'name': 'GNIS_NAME', 'type': 'esriFieldTypeString', 'alias': 'GNIS_NAME', 'sqlType': 'sqlTypeOther', 'length': 65, 'nullable': True, 'editable': True, 'domain': None, 'defaultValue': None}, {'name': 'LENGTHKM', 'type': 'esriFieldTypeDouble', 'alias': 'LENGTHKM', 'sqlType': 'sqlTypeOther', 'nullable': True, 'editable': True, 'domain': None, 'defaultValue': None}, {'name': 'REACHCODE', 'type': 'esriFieldTypeString', 'alias': 'REACHCODE', 'sqlType': 'sqlTypeOther', 'length': 14, 'nullable': True, 'editable': True, 'domain': None, 'defaultValue': None}, {'name': 'FTYPE', 'type': 'esriFieldTypeString', 'alias': 'FTYPE', 'sqlType': 'sqlTypeOther', 'length': 24, 'nullable': True, 'editable': True, 'domain': None, 'defaultValue': None}, {'name': 'MS_Hist', 'type': 'esriFieldTypeDouble', 'alias': 'MS_Hist', 'sqlType': 'sqlTypeOther', 'nullable': True, 'editable': True, 'domain': None, 'defaultValue': None}, {'name': 'MS_2040', 'type': 'esriFieldTypeDouble', 'alias': 'MS_2040', 'sqlType': 'sqlTypeOther', 'nullable': True, 'editable': True, 'domain': None, 'defaultValue': None}, {'name': 'MS_2080', 'type': 'esriFieldTypeDouble', 'alias': 'MS_2080', 'sqlType': 'sqlTypeOther', 'nullable': True, 'editable': True, 'domain': None, 'defaultValue': None}, {'name': 'MSchng_40', 'type': 'esriFieldTypeDouble', 'alias': 'MSchng_40', 'sqlType': 'sqlTypeOther', 'nullable': True, 'editable': True, 'domain': None, 'defaultValue': None}, {'name': 'MSchng_80', 'type': 'esriFieldTypeDouble', 'alias': 'MSchng_80', 'sqlType': 'sqlTypeOther', 'nullable': True, 'editable': True, 'domain': None, 'defaultValue': None}, {'name': 'MSgrp_40', 'type': 'esriFieldTypeString', 'alias': 'MSgrp_40', 'sqlType': 'sqlTypeOther', 'length': 6, 'nullable': True, 'editable': True, 'domain': None, 'defaultValue': None}, {'name': 'MSgrp_80', 'type': 'esriFieldTypeString', 'alias': 'MSgrp_80', 'sqlType': 'sqlTypeOther', 'length': 6, 'nullable': True, 'editable': True, 'domain': None, 'defaultValue': None}, {'name': 'Shape_Leng', 'type': 'esriFieldTypeDouble', 'alias': 'Shape_Leng', 'sqlType': 'sqlTypeOther', 'nullable': True, 'editable': True, 'domain': None, 'defaultValue': None}, {'name': 'Shape__Length', 'type': 'esriFieldTypeDouble', 'alias': 'Shape__Length', 'sqlType': 'sqlTypeDouble', 'nullable': True, 'editable': False, 'domain': None, 'defaultValue': None}]
[{'name': 'PK__R06_CC_S__F4B70D855C8597BF', 'fields': 'OBJECTID', 'isAscending': True, 'isUnique': True, 'description': '', 'indexType': 'Attribute'}, {'name': 'user_4481.R06_CC_SWOAP_HYDROPT3_LAYERS_01_PERCENT_DECREASE_IN_MEAN_SUMMER__LOW__FLOWS_IN_LOWER_FISH_CREEK_WATERSHED___HISTORIC_TO_2040S_Shape_sidx', 'fields': 'Shape', 'isAscending': True, 'isUnique': False, 'description': '', 'indexType': 'Spatial'}, {'name': 'Shape__Length_Index', 'fields': 'Shape__Length', 'isAscending': True, 'isUnique': False, 'description': '', 'indexType': 'Attribute'}]
{'renderer': {'type': 'classBreaks', 'field': 'MSchng_40', 'classificationMethod': 'esriClassifyManual', 'minValue': -80.4953648731, 'classBreakInfos': [{'symbol': {'type': 'esriSLS', 'style': 'esriSLSSolid', 'color': [255, 255, 128, 255], 'width': 1.5}, 'classMaxValue': -30, 'label': '30–40', 'description': ''}, {'symbol': {'type': 'esriSLS', 'style': 'esriSLSSolid', 'color': [56, 224, 9, 255], 'width': 1.5}, 'classMaxValue': -20, 'label': '20–30', 'description': ''}, {'symbol': {'type': 'esriSLS', 'style': 'esriSLSSolid', 'color': [26, 147, 171, 255], 'width': 1.5}, 'classMaxValue': -10, 'label': '10–20', 'description': ''}, {'symbol': {'type': 'esriSLS', 'style': 'esriSLSSolid', 'color': [12, 16, 120, 255], 'width': 1.5}, 'classMaxValue': 0, 'label': '0–10', 'description': ''}]}, 'transparency': 0, 'labelingInfo': None}
[]
[{'name': 'Percent Decrease in Mean Summer (Low) Flows in Lower Fish Creek Watershed - Historic to 2040s', 'description': '', 'drawingTool': 'esriFeatureEditToolLine', 'prototype': {'attributes': {'MSgrp_80': None, 'Shape_Leng': None, 'COMID': None, 'GNIS_NAME': None, 'LENGTHKM': None, 'REACHCODE': None, 'FTYPE': None, 'MS_Hist': None, 'MS_2040': None, 'MS_2080': None, 'MSchng_40': None, 'MSchng_80': None, 'MSgrp_40': None}}}]