The application of Landsat image data to rangeland assessment and monitoring: An example from South Australia.

1983 ◽  
Vol 5 (2) ◽  
pp. 63 ◽  
Author(s):  
RD Graetz ◽  
MR Gentle ◽  
RP Pech ◽  
JF O'Callaghan ◽  
G Drewien
Keyword(s):  
Vegetation Indices ◽  
South Australia ◽  
Image Data ◽  
Rangeland Management ◽  
Landsat Image ◽  
Landsat Data ◽  
Individual Property ◽  
Resource Information ◽  
Arid Rangelands ◽  
Semi Arid

The potential of Landsat image data to assess and monitor an area of semi-arid rangelands in South Australia is demonstrated. The project is a cooperative ongoing one between CSIRO and a future operational user of Landsat, the South Australian Pastoral Board, and it has as its long-term aim the development of a Land Image-Based Resource Information System (LIBRIS) for rangeland management. Three separate stages of the project are described. The fist is the integration of tenure maps with Landsat image data to permit a useful analysis and interrogation of the combined Landsat data sets. The second is the derivation of vegetation indices from Landsat data that are applicable to the semi-arid rangelands. Indices of 'cover' and of 'greenness' have been derived, but this report concen- trates on the cover index only for it can be related to soil erosion hazard/landscape stability and, as such, it represents a simple, robust vegetation-related index derived directly from Landsat. Lastly this index is used to map both cover and trend (changes in cover). Cover changes over the period 1973-1980 are detected and reported for a test region of 8300 km2. With the integration of tenure boundaries the interrogation, mapping and reporting at the individual property level is demonstrable.

Assessing the performance of remotely sensed landscape function indices in semi-arid rangelands of Iran

2017 ◽  
Vol 39 (3) ◽  
pp. 253 ◽  
Author(s):  
F. Jafari ◽  
R. Jafari ◽  
H. Bashari
Keyword(s):  
Structural Properties ◽  
Vegetation Cover ◽  
Function Analysis ◽  
Remotely Sensed ◽  
Rangeland Management ◽  
Landscape Function ◽  
Structural And Functional Properties ◽  
Basin Scale ◽  
Arid Rangelands ◽  
Semi Arid

Appropriate rangeland management requires rangeland function analysis at broad scales. This study aimed to examine the potential of remotely sensed function indices extracted from Landsat data to evaluate the function of semi-arid rangelands in central Iran at the sub-basin scale. Three replicate 30-m transects were randomly placed in the dominant slope direction of 14 selected sub-basins. Various structural properties of vegetation (e.g. number and size of vegetation patches and interpatch lengths) and soil surface were scored based on the landscape function analysis (LFA) procedure. The obtained structural and function indices of the LFA, as well as field percent vegetation cover, were compared with the perpendicular distance vegetation index and remotely sensed function indices including proximity, lacunarity, leakiness index, and weighted mean patch size (WMPS). Remotely sensed function indices were found to be capable of discriminating rangeland landscapes with different conditions. Results showed that the structural properties of vegetation considered in the LFA could also be obtained through WMPS and proximity indices (R >0.76; P < 0.01). All indices, except for lacunarity, had significant correlations with percent vegetation cover and the strongest correlation was observed between WMPS and proximity. Our findings highlight the usefulness and efficiency of function indices derived from satellite data in the estimation of structural and functional properties of rangeland landscapes at the sub-basin scale.

Sensitivity of Landsat 7 & 8-derived vegetation indices on semi-arid rangelands of southwestern Uzbekistan

2020 ◽  
pp. 1-16 ◽  
Author(s):  
Toshpulot F. Rajabov ◽  
R. Douglas Ramsey ◽  
Bakhtiyor K. Mardonov ◽  
Muhtor G. Nasirov ◽  
Tashkhanim Rakhimova ◽  
...  
Keyword(s):  
Vegetation Indices ◽  
Landsat 7 ◽  
Arid Rangelands ◽  
Semi Arid

Calibration of LANDSAT data for sparsely vegetated semi-arid rangelands

1986 ◽  
Vol 7 (12) ◽  
pp. 1729-1750 ◽  
Author(s):  
R. P. PECH ◽  
A. W. DAVIS ◽  
R. R. LAMACRAFT ◽  
R. D. GRAETZ
Keyword(s):  
Landsat Data ◽  
Arid Rangelands ◽  
Semi Arid

scholarly journals Remote Sensing of Bush Encroachment on Commercial Cattle Farms in Semi-Arid Rangelands in Namibia

2011 ◽  
pp. 327-343
Author(s):  
Matthias Schröter ◽  
Oliver Jakoby ◽  
Roland Olbrich ◽  
Marcus Eichhorn ◽  
Stefan Baumgärtner
Keyword(s):  
Remote Sensing ◽  
Expert Knowledge ◽  
Accuracy Assessment ◽  
Vegetation Indices ◽  
Ground Truth ◽  
Aerial Photographs ◽  
Bush Encroachment ◽  
Arid Rangelands ◽  
Cattle Farms ◽  
Semi Arid

Bush encroachment is one of the most extensive changes in land cover in semi-arid rangelands and an urgent problem for cattle farming, rapidly reducing the productivity of the rangeland. Despite the severity of these consequences, a complete and accurate assessment of bush encroached areas is still missing at large. This study aims at assessing bush encroachment on commercial cattle farms in central Namibia by employing remote sensing methods to distinguish between areas covered by bush and open rangeland. The authors use different classification techniques and vegetation indices to characterize the nature of vegetation cover. Their analysis shows that results are sensitive to specific classifications of indices. As an accuracy assessment could not be run on these results the authors could not analyze which classification approximates real bush encroachment best. Hence, this study highlights the need for further analysis. Ground truth data, in the form of field mappings, high resolution aerial photographs or local expert knowledge are needed to gain further insights and produce reliable results.

Evaluation of methods of assessing vegetation change in the semi-arid rangelands of southern Australia.

1987 ◽  
Vol 9 (1) ◽  
pp. 5 ◽  
Author(s):  
AD Wilson ◽  
NA Abraham ◽  
R Barratt ◽  
J Choate ◽  
DR Green ◽  
...  
Keyword(s):  
Vegetation Change ◽  
South Australia ◽  
Canopy Cover ◽  
Soil Surface ◽  
Soil Condition ◽  
South Wales ◽  
Litter Cover ◽  
Precise Measure ◽  
Arid Rangelands ◽  
Semi Arid

Methods for measuring long-term changes in vegetation and soil condition were evaluated in terms of recording error, efficiency and value in meeting management objectives. The evaluation was made on 4-5 sites for each of six vegetation types across the semi-arid rangelands of South Australia and New South Wales. In the semi-arid woodlands the lowest errors of measurement (C.V. = 12-14%) were associated with point measures of canopy cover, while in the chenopod shrublands the most precise measure in most situations was the density of shrub clumps (C.V. = 12-16%). Measures of herbaceous and litter cover had a high error of measurement (e.g. C.V. = 60%) and observers were significantly different. The point measurement of the area of degraded soil surface was reliable on duplex soils, but not on gradational soils. The results are discussed in terms of their application for the monitoring of change in range condition. It is concluded that the most appropriate measure of the shrub layer is foliar cover in woodlands and clump density in chenopod shrublands.

Chemical composition and in vitro ruminal fermentation of common tree forages in the semi-arid rangelands of Swaziland

2008 ◽  
Vol 142 (1-2) ◽  
pp. 99-110 ◽  
Author(s):  
Solomon Tefera ◽  
V. Mlambo ◽  
B.J. Dlamini ◽  
A.M. Dlamini ◽  
K.D.N. Koralagama ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Ruminal Fermentation ◽  
Arid Rangelands ◽  
Common Tree ◽  
Semi Arid
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