Measurement of forest area by airborne laser scanner and its applicability.

Setojima, Masahiro; Akamatsu, Yukio; Funahashi, Manabu; Imai, Yasuhiko; Amano, Masahiro

doi:10.4287/jsprs.41.2_15

Cited by 9 publications

(2 citation statements)

References 1 publication

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“…The contour map used to construct the DEM was based on aerial photographs that substituted the canopy topography for the surface topography. We reviewed the figures showing the relationships between the surface and canopy topographies in Setojima et al (2002) and Sugimori et al (2003). These figures were based on surveys performed with an airborne laser scanner (which is generally more accurate than aerial photography).…”

Section: Discussionmentioning

confidence: 99%

Discriminating residual and colluvial soils using topographic analysis in a small, forested catchment in Japan

Maeda

Tanaka

Ohta

et al. 2007

Hydrological Processes

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Abstract:Soil moisture plays an important role in hydrology. Understanding factors (such as topography, vegetation, and meteorological conditions) that influence spatio-temporal variability in soil moisture, and how this influence is manifested, is important for understanding hydrological processes. A number of distributed (quasi-)physical hydrological models have been developed to investigate this subject. Previous studies have shown that the spatial differences in the distribution of soil types (residual and colluvial soils) dominantly reflect spatio-temporal fluctuations in soil moisture and runoff.We present a methodology for assessing the spatial distribution of residual and colluvial soils, which differ with respect to their physical characteristics, in a 0Ð88 km 2 forested catchment with complex topography and a complex land-use history. Our method is based on penetration resistance profile data; in this data set, each data point represents soil physical characteristics within an area of about 25 m 2 . If the spatial distribution of soils under similar meteorological, geological, historical land use, and other conditions could be characterized on the basis of similarity in topographic features, then the spatial distribution of soil could be predicted based on relationships between various topographic indices (e.g. topographic index and local slope). We tested whether our model correctly assessed the reference data. The model's results were 90Ð5% correct for residual soils and 87Ð3% correct for colluvial soils. Further studies will quantify the relationships between topographic features of land covered by residual and colluvial soils and changes in spatio-temporal variations in the catchment (e.g. vegetation and land use) as a function of geology or meteorology.

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Section: Discussionmentioning

confidence: 99%

Discriminating residual and colluvial soils using topographic analysis in a small, forested catchment in Japan

Maeda

Tanaka

Ohta

et al. 2007

Hydrological Processes

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“…3. The shapes of the building complexes are determined using a digital surface model (DSM) and a digital elevation model (DEM) prepared by an aeronautical laser profiler from three-dimensional geographical information system data (Setojima et al 2002).…”

Section: Modelling the Building Complexmentioning

confidence: 99%

Thermal Energy Balance Analysis of the Tokyo Metropolitan Area Using a Mesoscale Meteorological Model Incorporating an Urban Canopy Model

Ooka

Sato

Harayama

et al. 2010

Boundary-Layer Meteorol

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The summer climate around the Tokyo metropolitan area has been analysed on an urban scale, and the regional characteristics of the thermal energy balance of a bayside business district in the centre of Tokyo (Otemachi) have been compared with an inland residential district (Nerima), using a mesoscale meteorological model incorporating an urban canopy model. From the results of the analysis, the mechanism of diurnal change in air temperature and absolute humidity in these areas is quantitatively demonstrated, with a focus on the thermal energy balance. Moreover, effective countermeasures against urban heat-islands are considered from the viewpoint of each region's thermal energy balance characteristics. In addition to thermal energy outflux by turbulent diffusion, advection by sea-breezes from Tokyo Bay discharges sensible heat in Otemachi. This mitigates temperature increases during the day. On the other hand, because all sea-breezes must first cross the centre of Tokyo, it has less of a cooling effect in Nerima. As a result, the air temperature during the day in Nerima is higher than that in Otemachi.

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Influence of transmittance and sampling density of laser beams in forest measurement of a Cryptomeria japonica stand with an airborne laser scanner

Hirata

2005

JFP

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Measurement of forest area by airborne laser scanner and its applicability.

Cited by 9 publications

References 1 publication

Discriminating residual and colluvial soils using topographic analysis in a small, forested catchment in Japan

Discriminating residual and colluvial soils using topographic analysis in a small, forested catchment in Japan

Thermal Energy Balance Analysis of the Tokyo Metropolitan Area Using a Mesoscale Meteorological Model Incorporating an Urban Canopy Model

Influence of transmittance and sampling density of laser beams in forest measurement of a Cryptomeria japonica stand with an airborne laser scanner

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