AWRA-L input spatial layers at ~1 km and ~5 km resolutions for the Australian continent - Source data and comparison between 1 km and 5 kmresolutions

[摘要] The AWRA-L model requires a number of spatial data layers for climate, vegetation, land surface and soil properties. The older versions of AWRA-L (v5.0 and earlier) have been implemented across Australia at 0.05o (~5 km) spatial resolution. In the last FY 2016-2017, the CSIRO and the Bureau of Meteorology implemented AWRA-L at 0.01o (~1 km) spatial resolution across the Murrumbidgee river basin and also increased the number of hydrological response units (HRUs) from two (representing shallow and deep rooted vegetation) to five (representing shallow and deep rooted vegetation along with impervious areas, large water bodies and irrigated agricultural areas). The overall results from the modelling experiments and comparison with observations suggested that incorporating extra HRUs to explicitly represent impervious areas, large water bodies and irrigated agricultural areas and modelling the associated hydrological processes for each of these HRUs at 1km spatial grid resolution provides AWRA-Lv6.0 with the ability to modelactual field representation for the region which in turn provides improved water balance estimates making AWRA-L suitable for catchment and local scale applications. The CSIRO and the Bureau regenerated all the AWRA-L spatial layers for the Australian continent for five HRUs both at 0.05o (~5 km) and 0.01o (~1 km) spatial resolutions. This document provides brief description ofeach of the spatial layers (including the source data used to derive the layers) that will be used in the continental AWRA-L implementation. The spatial layers are generated at both 1 km and 5 km spatial resolutions for the Australian continent and a simple/visual comparison is undertaken to show/highlight the spatial variability of the 1 km data layer within the 5 km grids. The methodology for estimating soil hydraulic properties at 1 km and 5 km grids using pedotransfer functions and digital soil mapping is described in Appendix A.

[发布日期] 2018-05-30 [发布机构] CSIRO

[学科分类] 地球科学(综合)