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首页> 外文期刊>Transactions in GIS: TG >Using GRASS GIS to Model Solar Irradiation on North Carolina Aquatic Habitats with Canopy Data
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Using GRASS GIS to Model Solar Irradiation on North Carolina Aquatic Habitats with Canopy Data

机译：使用GRASS GIS利用冠层数据对北卡罗来纳州水生栖息地的太阳辐射进行建模

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摘要

Sunlight can have a significant impact on freshwater aquatic communities. Using 64- bit GRASS, a previously generated 18.2m resolution forest canopy height grid for the State of North Carolina was used as a base elevation layer for calculation of 18.2m resolution total irradiance (Watt-hours/square meter/day) grids for 365 days of the year. Daily calculations were aggregated annually and overlaid on rasterized 1:24,000-scale USGS hydrology with canopy type and seasonal filters to quantify annual solar irradiation input to streams and rivers in North Carolina. Bare earth calculations of solar irradiation for the aquatic habitats were compared to the canopy filtered calculations. There was substantially less solar irradiation in aquatic habitats under the canopy filtered model. Total solar irradiation for subbasins created from point locations of occurrences of Dwarf wedgemussel (Alasmidonta heterodon) were compared with total solar irradiation for watersheds created from locations with no mussels for the full subbasin, 1km, and 500m upstream from the sampling point. There was no significant difference in the amount of total solar irradiation modeled for the subbasins with Dwarf wedgemussel and watersheds with no mussels. Published 2012. This article is a U.S. Government work and is in the public domain in the USA.
机译：阳光可以对淡水水生社区产生重大影响。使用64位GRASS，将先前为北卡罗莱纳州生成的分辨率为18.2m的森林冠层高度网格用作基础高程层，以计算365的分辨率为18.2m的总辐照度（瓦时/平方米/天）一年中的几天。每年汇总每日计算，并将其覆盖在栅格化的1：24,000比例的USGS水文上，该水文类型具有冠层类型和季节性过滤器，以量化北卡罗来纳州河流和河流的年度太阳辐射输入。将水生生境的太阳辐射的裸土计算与冠层滤波计算进行了比较。在冠层过滤模式下，水生生境中的太阳辐射明显减少。比较了从矮楔形贻贝（Alasmidonta heterodon）发生点位置创建的子盆地的总太阳辐射与从整个采样盆地，距采样点上游1km和500m的无贻贝的位置创建的分水岭的总太阳辐射。对于具有矮楔形贻贝的流域和没有贻贝的流域，模拟的总太阳辐射量没有显着差异。 2012年发布。本文是美国政府的工作，在美国属于公共领域。

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