Detecting major terrain parameters relating to mass movements' occurrence using GIS, remote sensing and statistical correlations, case study Lebanon

Abdallah, Chadi; Chorowicz, J.; Kheir, Rania Bou; Khawlie, Mohamad

doi:10.1016/j.rse.2005.09.014

Cited by 27 publications

(14 citation statements)

References 22 publications

(24 reference statements)

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“…In the case of large gullies, as the ones in the Penedès region, improving vegetation cover conditions on gully walls does not assure the stabilization of walls. With other landforms, the least vegetated land tends to be most prone to mass movement activity, and as the vegetation density increases the stability of soil tends to increase (Rey, 2003;Abdallah et al, 2005). The effectiveness of vegetation on gully walls to produce stabilization depends on the stage of gully development and whether mass movements have begun (Betts et al, 2003;Valentin et al, 2005).…”

Section: Discussionmentioning

confidence: 99%

Effects of land‐use changes in vegetation cover and sidewall erosion in a gully head of the Penedès region (northeast Spain)

Martínez‐Casasnovas

Ramos

García-Hernández

2009

Earth Surf Processes Landf

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The present research addresses the effects of land-use changes in the evolution of vegetation cover on gully erosion in the Penedès region of northeast Spain. The contribution of vegetation cover to gully wall stabilization is also discussed. The catchment area of the gully is 60⋅2 ha and is mainly composed of vineyards. In this area, large gullies have developed on Tertiary marls and unconsolidated sandstones. Detailed aerial photographs (1 : 5000 and 1 : 7000 scale) of three dates (1975, 1995 and 2002) were ortho-rectifi ed to derive land-use information in the catchment, gully vegetation cover and height information to construct detailed digital elevation models. Land-use and gully vegetation cover mapping of the most recent period was assisted by means of fi eldwork and a photo-interpretation key constructed to help map the older dates. Soil loss in the catchment was estimated for the 1975 and 2002 scenarios to determine the relations between land-use changes to vegetation cover changes and gully sidewall erosion. The Revised Universal Soil Loss Equation was applied for that purpose. Sidewall mass movements were determined by subtraction of digital elevation models (1 m resolution) of each period. The results show important land-use changes in the catchment due to fi eld reorganization for the plantation of mechanized vineyards. It increased soil loss from agricultural fi elds by 26⋅5%, which infl uenced vegetation cover dynamics on gully walls, with an important development of scrubland to forest, and gully erosion, with sidewall retreat at rates of 0⋅025 to 0⋅50 ha y −1 and mass movements at rates of 16 to 63⋅2 Mg ha −1 y −1 . These results indicate that vegetation cover on gully walls, although suggesting an improvement with respect to wall protection against splash, sheet and rill erosion, did not affect sidewall retreat and mass movements.

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Section: Discussionmentioning

confidence: 99%

Effects of land‐use changes in vegetation cover and sidewall erosion in a gully head of the Penedès region (northeast Spain)

Martínez‐Casasnovas

Ramos

García-Hernández

2009

Earth Surf Processes Landf

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“…Hence, it is necessary to study the spatial characterization of the relationship between seasonal variation of NPP and climate. The integration of remote sensing data and geographic information system (GIS) technology provides a potential approach to this study (Abdallah et al, 2005;López-Blanco and Villers-Ruiz, 1995;Wang et al, 2008).…”

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confidence: 99%

Spatial and seasonal characterization of net primary productivity and climate variables in southeastern China using MODIS data

Peng

Huang

Huete

et al. 2010

J. Zhejiang Univ. Sci. B

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Abstract:We developed a sophisticated method to depict the spatial and seasonal characterization of net primary productivity (NPP) and climate variables. The role of climate variability in the seasonal variation of NPP exerts delayed and continuous effects. This study expands on this by mapping the seasonal characterization of NPP and climate variables from space using geographic information system (GIS) technology at the pixel level. Our approach was developed in southeastern China using moderate-resolution imaging spectroradiometer (MODIS) data. The results showed that air temperature, precipitation and sunshine percentage contributed significantly to seasonal variation of NPP. In the northern portion of the study area, a significant positive 32-d lagged correlation was observed between seasonal variation of NPP and climate (P<0.01), and the influences of changing climate on NPP lasted for 48 d or 64 d. In central southeastern China, NPP showed 16-d, 48-d, and 96-d lagged correlation with air temperature, precipitation, and sunshine percentage, respectively (P<0.01); the influences of air temperature and precipitation on NPP lasted for 48 d or 64 d, while sunshine influence on NPP only persisted for 16 d. Due to complex topography and vegetation distribution in the southern part of the study region, the spatial patterns of vegetation-climate relationship became complicated and diversiform, especially for precipitation influences on NPP. In the northern part of the study area, all vegetation NPP had an almost similar response to seasonal variation of air temperature except for broad crops. The impacts of seasonal variation of precipitation and sunshine on broad and cereal crop NPP were slightly different from other vegetation NPP.

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“…lithology, proximity to fault line, karst type, soil type, distance to drainage line, elevation, slope gradient, slope aspect, slope curvature, land cover/use, and proximity to roads were generated and used to statistically explain block falls' field measurements within the study area. These parameters were chosen according to our field observations, and the consultation of several works done in similar or dissimilar environmental conditions (Abdallah et al, 2005).…”

Section: Collection Of Predictor Parameters Of Block Falls' Occurrencementioning

confidence: 99%

Spatial distribution of block falls using volumetric GIS–decision-tree models

Abdallah

2010

International Journal of Applied Earth Observation and Geoinfor

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Detecting major terrain parameters relating to mass movements' occurrence using GIS, remote sensing and statistical correlations, case study Lebanon

Cited by 27 publications

References 22 publications

Effects of land‐use changes in vegetation cover and sidewall erosion in a gully head of the Penedès region (northeast Spain)

Effects of land‐use changes in vegetation cover and sidewall erosion in a gully head of the Penedès region (northeast Spain)

Spatial and seasonal characterization of net primary productivity and climate variables in southeastern China using MODIS data

Spatial distribution of block falls using volumetric GIS–decision-tree models

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