气候变化领域集成服务门户(CCPortal): Snow depth mapping in high-alpine catchments using digital photogrammetry

CCPortal

DOI	10.5194/tc-9-229-2015
	Snow depth mapping in high-alpine catchments using digital photogrammetry
	Bühler Y.; Marty M.; Egli L.; Veitinger J.; Jonas T.; Thee P.; Ginzler C.
发表日期	2015
ISSN	19940416
卷号	9 期号:1
英文摘要	Information on snow depth and its spatial distribution is crucial for numerous applications in snow and avalanche research as well as in hydrology and ecology. Today, snow depth distributions are usually estimated using point measurements performed by automated weather stations and observers in the field combined with interpolation algorithms. However, these methodologies are not able to capture the high spatial variability of the snow depth distribution present in alpine terrain. Continuous and accurate snow depth mapping has been successfully performed using laser scanning but this method can only cover limited areas and is expensive. We use the airborne ADS80 optoelectronic scanner, acquiring stereo imagery with 0.25 m spatial resolution to derive digital surface models (DSMs) of winter and summer terrains in the neighborhood of Davos, Switzerland. The DSMs are generated using photogrammetric image correlation techniques based on the multispectral nadir and backward-looking sensor data. In order to assess the accuracy of the photogrammetric products, we compare these products with the following independent data sets acquired simultaneously: (a) manually measured snow depth plots; (b) differential Global Navigation Satellite System (dGNSS) points; (c) terrestrial laser scanning (TLS); and (d) ground-penetrating radar (GPR) data sets. We demonstrate that the method presented can be used to map snow depth at 2 m resolution with a vertical depth accuracy of ±30 cm (root mean square error) in the complex topography of the Alps. The snow depth maps presented have an average accuracy that is better than 15 % compared to the average snow depth of 2.2 m over the entire test site. © Author(s) 2015.
学科领域	alpine environment; avalanche; depth determination; digital photogrammetry; GNSS; ground penetrating radar; snow cover; spatial resolution; vertical distribution; weather station; Davos; Graubunden; Switzerland
语种	英语
scopus关键词	alpine environment; avalanche; depth determination; digital photogrammetry; GNSS; ground penetrating radar; snow cover; spatial resolution; vertical distribution; weather station; Davos; Graubunden; Switzerland
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/119960
作者单位	WSL Institute for Snow, Avalanche Research SLF, Davos, Switzerland; Physikalisch-Meteorologisches Observatorium Davos, World Radiation Center (PMOD/WRC), Davos, Switzerland; Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Birmensdorf, Switzerland; Department of Geography, University of Zurich, Zurich, Switzerland
推荐引用方式 GB/T 7714	Bühler Y.,Marty M.,Egli L.,et al. Snow depth mapping in high-alpine catchments using digital photogrammetry[J],2015,9(1).
APA	Bühler Y..,Marty M..,Egli L..,Veitinger J..,Jonas T..,...&Ginzler C..(2015).Snow depth mapping in high-alpine catchments using digital photogrammetry.Cryosphere,9(1).
MLA	Bühler Y.,et al."Snow depth mapping in high-alpine catchments using digital photogrammetry".Cryosphere 9.1(2015).