Object-based cropland degradation identification: A case study in Uzbekistan

Olena Dubovyk, Gunter Menz, Christopher Conrad, Asia Khamzina

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)

Abstract

Sustainability of irrigated agriculture-based economies, such as in Central Asia, is threatened by cropland degradation. The field-based identification of the degraded agricultural areas can aid in developing appropriate land rehabilitation and monitoring programs. This paper combined the object-based change detection and spectral mixture analysis to develop an approach for identifying parcels of irrigated degraded cropland in Northern Uzbekistan, Central Asia. A linear spectral unmixing, followed by the object-based change vector analysis, was applied to the multiple Landsat TM images, acquired in 1987 and 2009. Considering a spectral dimensionality of Landsat TM, a multiple 4-endmember model (green vegetation, water, dark soil, and bright soil) was set up for the analysis. The spectral unmixing results were valid, as indicated by the low values of overall root mean square errors in a range below <2.5% for all images. The results of change detection revealed that about 34% (84,540 ha) of cropland in the study area were affected by the degradation processes to varying degrees. Spatial distribution of degraded fields was mainly associated with the abandoned fields and lands with inherently low fertile soils. The proposed approach could be elaborated for a field-based monitoring of cropland degradation in similar landscapes of Central Asia and elsewhere.

Original languageEnglish
Title of host publicationEarth Resources and Environmental Remote Sensing/GIS Applications III
DOIs
Publication statusPublished - 2012 Dec 1
Externally publishedYes
EventEarth Resources and Environmental Remote Sensing/GIS Applications III - Edinburgh, United Kingdom
Duration: 2012 Sep 242012 Sep 26

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8538
ISSN (Print)0277-786X

Conference

ConferenceEarth Resources and Environmental Remote Sensing/GIS Applications III
CountryUnited Kingdom
CityEdinburgh
Period12/9/2412/9/26

Fingerprint

Uzbekistan
farmlands
Spectral Unmixing
Soil
Degradation
Landsat
Change Detection
degradation
Soils
soils
change detection
Monitoring
Rehabilitation
Agriculture
Sustainability
vector analysis
Vegetation
Spatial Distribution
Mean square error
Patient rehabilitation

Keywords

  • Central Asia
  • Change vector analysis
  • Irrigated cropland
  • Land cover degradation
  • Landsat TM
  • Object-based analysis
  • Spectral unmixing

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Dubovyk, O., Menz, G., Conrad, C., & Khamzina, A. (2012). Object-based cropland degradation identification: A case study in Uzbekistan. In Earth Resources and Environmental Remote Sensing/GIS Applications III [85380W] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 8538). https://doi.org/10.1117/12.974647

Object-based cropland degradation identification : A case study in Uzbekistan. / Dubovyk, Olena; Menz, Gunter; Conrad, Christopher; Khamzina, Asia.

Earth Resources and Environmental Remote Sensing/GIS Applications III. 2012. 85380W (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 8538).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Dubovyk, O, Menz, G, Conrad, C & Khamzina, A 2012, Object-based cropland degradation identification: A case study in Uzbekistan. in Earth Resources and Environmental Remote Sensing/GIS Applications III., 85380W, Proceedings of SPIE - The International Society for Optical Engineering, vol. 8538, Earth Resources and Environmental Remote Sensing/GIS Applications III, Edinburgh, United Kingdom, 12/9/24. https://doi.org/10.1117/12.974647
Dubovyk O, Menz G, Conrad C, Khamzina A. Object-based cropland degradation identification: A case study in Uzbekistan. In Earth Resources and Environmental Remote Sensing/GIS Applications III. 2012. 85380W. (Proceedings of SPIE - The International Society for Optical Engineering). https://doi.org/10.1117/12.974647
Dubovyk, Olena ; Menz, Gunter ; Conrad, Christopher ; Khamzina, Asia. / Object-based cropland degradation identification : A case study in Uzbekistan. Earth Resources and Environmental Remote Sensing/GIS Applications III. 2012. (Proceedings of SPIE - The International Society for Optical Engineering).
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