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New Shade Effectiveness
Field name = [SolDifMax]
The attribute 'new shade effectiveness' predicts where future additional shade (above current conditions, based on LEMMA data) would yield the largest reductions in thermal energy to streams.
The current shade-thermal energy attribute ('Current Shade-Thermal Energy' in NetMap Portal) is compared to a hypothesized maximum shade value (based on the ninetieth percentile of tree height and basal area in the watershed) to calculate the thermal energy difference (e.g., 'most effective shade'), that can be used to identify locations where adding shade would be most effective. See NetMap's full online Technical Help.If these attributes are not available for your own watershed, please contact us.
The estimates in watt-hours/m2 are for the hottest day of the year (July 20th), using the shade model of (Groom et al. 2011). The amount of solar radiation into streams is based on current vegetation basal area, tree height, channel width, channel orientation, topogrpahic shading and solar angle.
