TAILING MODELLED AND MEASURED SPECTRUM FOR MINE TAILING MAPPING IN TUNISIAN SEMI-ARID CONTEXT.pptx
TAILING MODELLED AND MEASURED SPECTRUM FOR MINE TAILING MAPPING IN TUNISIAN SEMI-ARID CONTEXT
description
Transcript of TAILING MODELLED AND MEASURED SPECTRUM FOR MINE TAILING MAPPING IN TUNISIAN SEMI-ARID CONTEXT
![Page 1: TAILING MODELLED AND MEASURED SPECTRUM FOR MINE TAILING MAPPING IN TUNISIAN SEMI-ARID CONTEXT](https://reader033.fdocuments.net/reader033/viewer/2022051317/568165d9550346895dd8ebd5/html5/thumbnails/1.jpg)
TAILING MODELLED AND MEASURED SPECTRUM FOR
MINE TAILING MAPPING INTUNISIAN SEMI-ARID CONTEXT
N. Mezned1,2, S. Abdeljaouad1 , M. R. Boussema3
12011 IEEE Internaional Geoscience and Remote
Sensing Symposium- 29 julyN. Mezned
1 RME/FST, (Tunis, Tunisia)
3 LTSIRS/ENIT, (Tunis, Tunisia)
2 Isepbg (Tunis, Tunisia)
RME
![Page 2: TAILING MODELLED AND MEASURED SPECTRUM FOR MINE TAILING MAPPING IN TUNISIAN SEMI-ARID CONTEXT](https://reader033.fdocuments.net/reader033/viewer/2022051317/568165d9550346895dd8ebd5/html5/thumbnails/2.jpg)
Context
22011 IEEE Internaional Geoscience and
Remote Sensing Symposium- 29 julyN. Mezned
Mine tailing impact
Water qualitySoils Vegetation Ecologic Systems
Ba/Fl Hammam Zriba mine site Tunisia
Pb/Zn Jebel Hallouf-Bouaouane mine site Tunisia
Pb/Zn Jebel Ressas mine site Tunisia Pb/Zn Jebel Ressas mine site Tunisia
Human life
![Page 3: TAILING MODELLED AND MEASURED SPECTRUM FOR MINE TAILING MAPPING IN TUNISIAN SEMI-ARID CONTEXT](https://reader033.fdocuments.net/reader033/viewer/2022051317/568165d9550346895dd8ebd5/html5/thumbnails/3.jpg)
Context
Mejerda river watershed: precious source of water
3
North of Tunisia: several types of mine (Pb, Zn, Fl, …, etc.)
Environment risksa
aa
2011 IEEE Internaional Geoscience and Remote Sensing Symposium- 29 julyN. Mezned
![Page 4: TAILING MODELLED AND MEASURED SPECTRUM FOR MINE TAILING MAPPING IN TUNISIAN SEMI-ARID CONTEXT](https://reader033.fdocuments.net/reader033/viewer/2022051317/568165d9550346895dd8ebd5/html5/thumbnails/4.jpg)
Context
4
Necessity of mine tailing mapping
Advantages: low costs spatial coverage
Remote sensing: satellite data2011 IEEE Internaional Geoscience and
Remote Sensing Symposium- 29 julyN. Mezned
![Page 5: TAILING MODELLED AND MEASURED SPECTRUM FOR MINE TAILING MAPPING IN TUNISIAN SEMI-ARID CONTEXT](https://reader033.fdocuments.net/reader033/viewer/2022051317/568165d9550346895dd8ebd5/html5/thumbnails/5.jpg)
1) Context
2) Study area and problematic
3) The used data
4) The proposed approach
5) Experimental results
6) Conclusion and perspectives
OUTLINES
52011 IEEE Internaional Geoscience and
Remote Sensing Symposium- 29 julyN. Mezned
![Page 6: TAILING MODELLED AND MEASURED SPECTRUM FOR MINE TAILING MAPPING IN TUNISIAN SEMI-ARID CONTEXT](https://reader033.fdocuments.net/reader033/viewer/2022051317/568165d9550346895dd8ebd5/html5/thumbnails/6.jpg)
2) Study area and problematic
6
Mine tailings
Kassab Wady
Mejerda River
Jebel Hallouf-Bouaouane Mine
2011 IEEE Internaional Geoscience and Remote Sensing Symposium- 29 july
N. Mezned
![Page 7: TAILING MODELLED AND MEASURED SPECTRUM FOR MINE TAILING MAPPING IN TUNISIAN SEMI-ARID CONTEXT](https://reader033.fdocuments.net/reader033/viewer/2022051317/568165d9550346895dd8ebd5/html5/thumbnails/7.jpg)
2) Study area and problematic
7
188 mille tonnes of metal (84 Pb et 64 Zn) in 1952 Abandoned since 1986
Jebel Hallouf-Bouaouane
Environment impactMine activity
Important quantity of tailing
Terrain subsidence 2011 IEEE Internaional Geoscience and
Remote Sensing Symposium- 29 julyN. Mezned
![Page 8: TAILING MODELLED AND MEASURED SPECTRUM FOR MINE TAILING MAPPING IN TUNISIAN SEMI-ARID CONTEXT](https://reader033.fdocuments.net/reader033/viewer/2022051317/568165d9550346895dd8ebd5/html5/thumbnails/8.jpg)
1) Context
2) Study area and problematic
3) Work positioning
4) The used data
5) The proposed approach
6) Experimental results
7) Conclusion and perspectives
OUTLINES
82011 IEEE Internaional Geoscience and Remote Sensing Symposium- 29 july
N. Mezned
![Page 9: TAILING MODELLED AND MEASURED SPECTRUM FOR MINE TAILING MAPPING IN TUNISIAN SEMI-ARID CONTEXT](https://reader033.fdocuments.net/reader033/viewer/2022051317/568165d9550346895dd8ebd5/html5/thumbnails/9.jpg)
3) Work positioning
9
Passive Remote sensed data
Multispectral data (landsat TM, ETM+, ASTER, etc.)
Mineral mapping using Landsat ETM+ data and field spectra measured with ASD spectroradiometer , (Liu et al., 2003)
Mineral mapping using Landsat TM data, (Zhang et al., 2007)
Mine site mapping using HyMap (Taylor and Vukovic, 2001) and Probe data (Staenz et al., 2003)
Hyperspectral data (Hyperion,HyMap, etc.)
+field measured spectra
or spectra from publicly library
2011 IEEE Internaional Geoscience and Remote Sensing Symposium- 29 july
N. Mezned
![Page 10: TAILING MODELLED AND MEASURED SPECTRUM FOR MINE TAILING MAPPING IN TUNISIAN SEMI-ARID CONTEXT](https://reader033.fdocuments.net/reader033/viewer/2022051317/568165d9550346895dd8ebd5/html5/thumbnails/10.jpg)
3) Work positioning
10
Passive Remote sensed data
Problems :• Mine tailing risks on environment and human health
Objective: Mine tailing mapping using multispectral data Tailing modelled spectra with respect to the field truth
SMA overcome the luck of spectroradimeter
2011 IEEE Internaional Geoscience and Remote Sensing Symposium- 29 july
N. Mezned
![Page 11: TAILING MODELLED AND MEASURED SPECTRUM FOR MINE TAILING MAPPING IN TUNISIAN SEMI-ARID CONTEXT](https://reader033.fdocuments.net/reader033/viewer/2022051317/568165d9550346895dd8ebd5/html5/thumbnails/11.jpg)
1) Context
2) Study area and problematic
3) Work positioning
4) The used data
5) The proposed approach
6) Experimental results
7) Conclusion and perspectives
OUTLINES
112011 IEEE Internaional Geoscience and Remote Sensing Symposium- 29 july
N. Mezned
![Page 12: TAILING MODELLED AND MEASURED SPECTRUM FOR MINE TAILING MAPPING IN TUNISIAN SEMI-ARID CONTEXT](https://reader033.fdocuments.net/reader033/viewer/2022051317/568165d9550346895dd8ebd5/html5/thumbnails/12.jpg)
3) The used data
12
Multispectral data: Landsat ETM+
• 6 bands,• 30 m,
Field campaign data: Mineral identification and abundance estimation
• 18 samples/dyke = 54 tailing measurements,
Landsat ETM+(05/03/2000)
Publically library: JPL spectral data
2011 IEEE Internaional Geoscience and Remote Sensing Symposium- 29 july
N. Mezned
![Page 13: TAILING MODELLED AND MEASURED SPECTRUM FOR MINE TAILING MAPPING IN TUNISIAN SEMI-ARID CONTEXT](https://reader033.fdocuments.net/reader033/viewer/2022051317/568165d9550346895dd8ebd5/html5/thumbnails/13.jpg)
1) Context
2) Study area: Soil salinity, the problematic
3) The used data
4) Work positioning
5) The proposed approach
6) Experimental results
7) Conclusion and perspectives
OUTLINES
132011 IEEE Internaional Geoscience and Remote Sensing Symposium- 29 july
N. Mezned
![Page 14: TAILING MODELLED AND MEASURED SPECTRUM FOR MINE TAILING MAPPING IN TUNISIAN SEMI-ARID CONTEXT](https://reader033.fdocuments.net/reader033/viewer/2022051317/568165d9550346895dd8ebd5/html5/thumbnails/14.jpg)
5) The proposed approach
14
Tailing modeling spectrum for ETM+ classification: spectral unmixing
ETM+ image pre-
processing
endmember select
ion
Classification
Validation
2011 IEEE Internaional Geoscience and Remote Sensing Symposium- 29 july
N. Mezned
![Page 15: TAILING MODELLED AND MEASURED SPECTRUM FOR MINE TAILING MAPPING IN TUNISIAN SEMI-ARID CONTEXT](https://reader033.fdocuments.net/reader033/viewer/2022051317/568165d9550346895dd8ebd5/html5/thumbnails/15.jpg)
5) The proposed approach
15
Tailing modeling spectrum for ETM+ classification: spectral unmixing
ETM+ image pre-
processing
endmember select
ion
Classification
Validation
Tailing component spectrum?
Direct mean: Measured by spectroradiometer
Indirect mean: Modelled with respect of field truth
Vegetation Soils
2011 IEEE Internaional Geoscience and Remote Sensing Symposium- 29 july
N. Mezned
![Page 16: TAILING MODELLED AND MEASURED SPECTRUM FOR MINE TAILING MAPPING IN TUNISIAN SEMI-ARID CONTEXT](https://reader033.fdocuments.net/reader033/viewer/2022051317/568165d9550346895dd8ebd5/html5/thumbnails/16.jpg)
5) The proposed approach
16
Tailing modeling spectrum for ETM+ classification: spectral unmixing
ETM+ image pre-
processing
endmember select
ion
Classification
Validation
Linear spectral unmixing
1. Vegetation2. Soils3. Mine tailings
3 fraction maps
Measured spectrum
Modelled spectrum
2011 IEEE Internaional Geoscience and Remote Sensing Symposium- 29 july
N. Mezned
![Page 17: TAILING MODELLED AND MEASURED SPECTRUM FOR MINE TAILING MAPPING IN TUNISIAN SEMI-ARID CONTEXT](https://reader033.fdocuments.net/reader033/viewer/2022051317/568165d9550346895dd8ebd5/html5/thumbnails/17.jpg)
5) The proposed approach
17
Tailing modeling spectrum for ETM+ classification: spectral unmixing
ETM+ image pre-
processing
endmember select
ion
Classification
Validation
Comparison RMS errors
2011 IEEE Internaional Geoscience and Remote Sensing Symposium- 29 july
N. Mezned
![Page 18: TAILING MODELLED AND MEASURED SPECTRUM FOR MINE TAILING MAPPING IN TUNISIAN SEMI-ARID CONTEXT](https://reader033.fdocuments.net/reader033/viewer/2022051317/568165d9550346895dd8ebd5/html5/thumbnails/18.jpg)
1) Context
2) Study area: Soil salinity, the problematic
3) The used data
4) Work positioning
5) The proposed approach
6) Experimental results
7) Conclusion and perspectives
OUTLINES
182011 IEEE Internaional Geoscience and Remote Sensing Symposium- 29 july
N. Mezned
![Page 19: TAILING MODELLED AND MEASURED SPECTRUM FOR MINE TAILING MAPPING IN TUNISIAN SEMI-ARID CONTEXT](https://reader033.fdocuments.net/reader033/viewer/2022051317/568165d9550346895dd8ebd5/html5/thumbnails/19.jpg)
19
5) Experimental results1. Tailing modelled spectrum: SMA
Re sampled spectra to Landsat ETM+ band passes
linear combination
JPL library
Pyrite
Quartz
Calcite
Galena
Hematite
Goethite
Kaolinite
Sphalerite
Tailing Modelled spectrum
2011 IEEE Internaional Geoscience and Remote Sensing Symposium- 29 july
N. Mezned
![Page 20: TAILING MODELLED AND MEASURED SPECTRUM FOR MINE TAILING MAPPING IN TUNISIAN SEMI-ARID CONTEXT](https://reader033.fdocuments.net/reader033/viewer/2022051317/568165d9550346895dd8ebd5/html5/thumbnails/20.jpg)
20
5) Experimental results1. Tailing mlodelled spectrum: SMA
Sampling18 samples for each dyke = 54 samples
- X Ray Diffraction XRD
- Counting on polished sections
- Calcimetry Identification and
% of minerals
Laboratory analysis
2011 IEEE Internaional Geoscience and Remote Sensing Symposium- 29 july
N. Mezned
![Page 21: TAILING MODELLED AND MEASURED SPECTRUM FOR MINE TAILING MAPPING IN TUNISIAN SEMI-ARID CONTEXT](https://reader033.fdocuments.net/reader033/viewer/2022051317/568165d9550346895dd8ebd5/html5/thumbnails/21.jpg)
21
5) Experimental results2. ETM+ Linear spectral unmixing
• We used both ASD measured and SMA modelled spectra in the classification processes,
Mine tailing fraction maps generated from the ETM+ linear spectral unmixing using: (a) the measured spectrum with ASD spectroradiometer and (b) the modelled tailing spectrum and (c)
2011 IEEE Internaional Geoscience and Remote Sensing Symposium- 29 july
N. Mezned
![Page 22: TAILING MODELLED AND MEASURED SPECTRUM FOR MINE TAILING MAPPING IN TUNISIAN SEMI-ARID CONTEXT](https://reader033.fdocuments.net/reader033/viewer/2022051317/568165d9550346895dd8ebd5/html5/thumbnails/22.jpg)
22
5) Experimental results2. Classification validation
< 2.6 10-5
< 3.3 10-5
< 1.9 10-5
99.6 % of pixels have an RMS errors:
using the modelled spectrum,
using the measured spectrum.
using derived ETM+ spectrum
tailing map
2011 IEEE Internaional Geoscience and Remote Sensing Symposium- 29 july
N. Mezned
![Page 23: TAILING MODELLED AND MEASURED SPECTRUM FOR MINE TAILING MAPPING IN TUNISIAN SEMI-ARID CONTEXT](https://reader033.fdocuments.net/reader033/viewer/2022051317/568165d9550346895dd8ebd5/html5/thumbnails/23.jpg)
23
5) Experimental results2. Classification validation
< 2.6 10-5
< 3.3 10-5
< 1.9 10-5
using the modelled spectrum,
using the measured spectrum.
using derived ETM+ spectrum
tailing map
99.6 % of pixels have an RMS errors:
2011 IEEE Internaional Geoscience and Remote Sensing Symposium- 29 july
N. Mezned
![Page 24: TAILING MODELLED AND MEASURED SPECTRUM FOR MINE TAILING MAPPING IN TUNISIAN SEMI-ARID CONTEXT](https://reader033.fdocuments.net/reader033/viewer/2022051317/568165d9550346895dd8ebd5/html5/thumbnails/24.jpg)
24
5) Experimental results2. Classification validation
< 2.6 10-5
< 3.3 10-5
< 1.9 10-5
using the modelled spectrum,
using the measured spectrum.
using derived ETM+ spectrum
tailing map
99.6 % of pixels have an RMS errors:
2011 IEEE Internaional Geoscience and Remote Sensing Symposium- 29 july
N. Mezned
![Page 25: TAILING MODELLED AND MEASURED SPECTRUM FOR MINE TAILING MAPPING IN TUNISIAN SEMI-ARID CONTEXT](https://reader033.fdocuments.net/reader033/viewer/2022051317/568165d9550346895dd8ebd5/html5/thumbnails/25.jpg)
1) Context
2) Study area: Soil salinity, the problematic
3) The used data
4) Work positioning
5) The proposed approach
6) Experimental results
7) Conclusion and perspectives
OUTLINES
252011 IEEE Internaional Geoscience and Remote Sensing Symposium- 29 july
N. Mezned
![Page 26: TAILING MODELLED AND MEASURED SPECTRUM FOR MINE TAILING MAPPING IN TUNISIAN SEMI-ARID CONTEXT](https://reader033.fdocuments.net/reader033/viewer/2022051317/568165d9550346895dd8ebd5/html5/thumbnails/26.jpg)
6) Conclusion and perspectives
The results comparison indicate that the modelled spectrum can even better characterize the tailings in the case of semi-arid context,
The SMA approach can be an optimal solution to replace the lack of the spectroradiometer and can be applied successfully to multispectral data analysis, particularly those acquired during previous periods.
Conclusion
Perspectives
We plan for more campaign, We propose to test the SMA approach for different mining sites.
262011 IEEE Internaional Geoscience and Remote Sensing Symposium- 29 july
N. Mezned
![Page 27: TAILING MODELLED AND MEASURED SPECTRUM FOR MINE TAILING MAPPING IN TUNISIAN SEMI-ARID CONTEXT](https://reader033.fdocuments.net/reader033/viewer/2022051317/568165d9550346895dd8ebd5/html5/thumbnails/27.jpg)
Thanks for your attention
272011 IEEE Internaional Geoscience and Remote Sensing Symposium- 29 july
N. Mezned