TY  - JOUR
A1  - Walz, Yvonne
A1  - Wegmann, Martin
A1  - Leutner, Benjamin
A1  - Dech, Stefan
A1  - Vounatsou, Penelope
A1  - N'Goran, Eliézer K.
A1  - Raso, Giovanna
A1  - Utzinger, Jürg
T1  - Use of an ecologically relevant modelling approach to improve remote sensing-based schistosomiasis risk profiling
JF  - Geospatial Health
N2  - Schistosomiasis is a widespread water-based disease that puts close to 800 million people at risk of infection with more than 250 million infected, mainly in sub-Saharan Africa. Transmission is governed by the spatial distribution of specific freshwater snails that act as intermediate hosts and the frequency, duration and extent of human bodies exposed to infested water sources during human water contact. Remote sensing data have been utilized for spatially explicit risk profiling of schistosomiasis. Since schistosomiasis risk profiling based on remote sensing data inherits a conceptual drawback if school-based disease prevalence data are directly related to the remote sensing measurements extracted at the location of the school, because the disease transmission usually does not exactly occur at the school, we took the local environment around the schools into account by explicitly linking ecologically relevant environmental information of potential disease transmission sites to survey measurements of disease prevalence. Our models were validated at two sites with different landscapes in Côte d’Ivoire using high- and moderateresolution remote sensing data based on random forest and partial least squares regression. We found that the ecologically relevant modelling approach explained up to 70% of the variation in Schistosoma infection prevalence and performed better compared to a purely pixelbased modelling approach. Furthermore, our study showed that model performance increased as a function of enlarging the school catchment area, confirming the hypothesis that suitable environments for schistosomiasis transmission rarely occur at the location of survey measurements.
KW  - Côte d’Ivoire
KW  - schistosomiasis
KW  - spatial risk profiling
KW  - remote sensing
KW  - ecological relevant model
Y1  - 2015
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-126148
VL  - 10
IS  - 2
ER  - 
TY  - JOUR
A1  - Timmermans, Wim J.
A1  - van der Tol, Christiaan
A1  - Timmermans, Joris
A1  - Ucer, Murat
A1  - Chen, Xuelong
A1  - Alonso, Luis
A1  - Moreno, Jose
A1  - Carrara, Arnaud
A1  - Lopez, Ramon
A1  - Fernando de la Cruz, Tercero
A1  - Corcoles, Horacio L.
A1  - de Miguel, Eduardo
A1  - Sanchez, Jose A. G.
A1  - Perez, Irene
A1  - Belen, Perez
A1  - Munoz, Juan-Carlos J.
A1  - Skokovic, Drazen
A1  - Sobrino, Jose
A1  - Soria, Guillem
A1  - MacArthur, Alasdair
A1  - Vescovo, Loris
A1  - Reusen, Ils
A1  - Andreu, Ana
A1  - Burkart, Andreas
A1  - Cilia, Chiara
A1  - Contreras, Sergio
A1  - Corbari, Chiara
A1  - Calleja, Javier F.
A1  - Guzinski, Radoslaw
A1  - Hellmann, Christine
A1  - Herrmann, Ittai
A1  - Kerr, Gregoire
A1  - Lazar, Adina-Laura
A1  - Leutner, Benjamin
A1  - Mendiguren, Gorka
A1  - Nasilowska, Sylwia
A1  - Nieto, Hector
A1  - Pachego-Labrador, Javier
A1  - Pulanekar, Survana
A1  - Raj, Rahul
A1  - Schikling, Anke
A1  - Siegmann, Bastian
A1  - von Bueren, Stefanie
A1  - Su, Zhongbo (Bob)
T1  - An Overview of the Regional Experiments for Land-atmosphere Exchanges 2012 (REFLEX 2012) Campaign
JF  - Acta Geophysica
N2  - The REFLEX 2012 campaign was initiated as part of a training course on the organization of an airborne campaign to support advancement of the understanding of land-atmosphere interaction processes. This article describes the campaign, its objectives and observations, remote as well as in situ. The observations took place at the experimental Las Tiesas farm in an agricultural area in the south of Spain. During the period of ten days, measurements were made to capture the main processes controlling the local and regional land-atmosphere exchanges. Apart from multi-temporal, multi-directional and multi-spatial space-borne and airborne observations, measurements of the local meteorology, energy fluxes, soil temperature profiles, soil moisture profiles, surface temperature, canopy structure as well as leaf-level measurements were carried out. Additional thermo-dynamical monitoring took place at selected sites. After presenting the different types of measurements, some examples are given to illustrate the potential of the observations made.
KW  - multi scale heterogeneity
KW  - quantitative remote sensing
KW  - remote
KW  - evapotranspiration
KW  - validation
KW  - issues
KW  - energy
KW  - models
KW  - water
KW  - flux
KW  - land-atmosphere interaction
KW  - turbulence
KW  - calibration and validation
Y1  - 2015
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-136491
VL  - 63
IS  - 6
ER  -