Non-stationary NG-IDF Dataset for Yakima River Basin (WA) and Walker River Basin (CA-NV)

Dataset DescriptionThis non-stationary NG-IDF dataset is derived from WRF-PGW and DHSVM simulations. For each basin, the dataset includes both grid cell-level data (6-km resolution) and HUC12 basin-level data.

WRF-PGW SimulationsThe simulations encompass:

Historical period: 1981–2010

Future projections: 2041–2070, based on five CMIP5 GCMs under the RCP8.5 scenario:

CanESM2

CESM1-CAM5

GFDL-ESM2M

HadGEM2-ES

MPI-ESM-MR

Data ContentFor each spatial scale, the dataset provides:

Hourly variables: Precipitation, water available for runoff (W), and snow water equivalent (SWE).

Annual maximum values: Daily precipitation and W, along with the W mechanism (categorized as rainfall, snowmelt-only, or rain-on-snow [ROS]).

PREC-IDF and NG-IDF curves: Precipitation-based intensity-duration-frequency (PREC-IDF) and next-generation IDF (NG-IDF) curves.

Associated PublicationThis dataset supports the study:Yan, H., Duan, Z., Wigmosta, M., Sun, N., Leung, R., Thurber, T., Gutmann, E., and Arnold, J. "How Flood Hazards in a Warming Climate Could Be Amplified by Changes in Spatiotemporal Patterns and Mechanisms of Water Available for Runoff," Earth's Future (under review).