Proceedings, XXth congress: Proceedings, XXth congress

Altan, M. Orhan

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Multivolume work

Persistent identifier:: 1663674213

Title:: Proceedings, XXth congress

Sub title:: Istanbul, 12 - 23 July 2004

Year of publication:: 2004

Place of publication:: Istanbul

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 1663674213

Language:: English

Additional Notes:: Erscheinungsdatum des Originals ist aus dem Copyrightjahr ermittelt.; Auch bezeichnet als XXth International Congress for Photogrammetry and Remote Sensing

Editor:: Altan, M. Orhan

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing, Commission Primary Data Acquisition

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing, Commission Primary Data Acquisition

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing, Commission Primary Data Acquisition

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing, Commission Primary Data Acquisition

Document type:: Multivolume work

Volume

Persistent identifier:: 166368779X

Title:: Proceedings, XXth congress

Scope:: IV, 226 Seiten

Year of publication:: 2004

Place of publication:: Istanbul

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 166368779X

Illustration:: Illustrationen, Diagramme

Signature of the source:: ZS 312(35,B8)

Language:: English

Additional Notes:: Erscheinungsdatum des Originals ist aus dem Copyrightjahr ermittelt.

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Editor:: Altan, M. Orhan

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2019

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: LOESS SOILS EROSION MULTITEMPORAL MEASURMENT USING PHOTOGRAMMETRY AND GEOINFORMATION METHODS Jaroslaw Januszewski

Document type:: Multivolume work

Structure type:: Chapter

International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B-YF. Istanbul 2004 author of this work to continue Bac's investigations, with the aid of modern geoinformation methods. The aim of this project was to evaluate quantitatively and qualita- tively the soil erosion in Dublany from 1922 to 1994. Usefulness of applied photogrammetric, cartographic and geoinformation methods was also considered. The research was expected to provide answers for two main questions: 1. How much the ground level has been changed during the time span of 72 years? 2. How does the extent and spatial distribution of this process look like? 2. DATA PROCESSING & ANALYSIS The measurement was based on the comparision of the two di- gital elevation models representing two ground levels: 1922 and 1994. The ground level change was expected to c.a. 1.5 m and therfore the measurements had to be carried out with possibly high accuracy. Figure 3. Plot image tone change caused by different superficial soil humus content In the first step, the strip of 3 B&W panchromatic aerial photo- graphs at scale 1:10 000 was scanned (with 24pm scanner aper- ture) and then photogrammetrically processed. After field GPS measurements, the strip was adjusted with accepted accuracy (RMSE ca. 0.4672 px). DTM for 1994 was produced also with the aid of photogrammetric methods (automatic generation based on image correlation with manual editing). In the next step deta- iled ortophoto (0.3m ground resolution) was generated. and then used to calibrate large scale (1:2 880) elevation map from 1922. The contour lines with 1m interval were digitised and 1922 DTM was interpolated. After standardization of the type and geometry (raster with 1m spatial resolution), both models were substracted (DTM1994 — DTM1922) and the resulting “diference” map was generated (pixel value represents the ground level change). To complete the analysis and facilitate comparison of the results several series of terrain profiles were generated. These profiles were spatially compatible with those published in Stanislaw Bac's article in 1928. 3. CONCLUSIONS The results of the study led to the following conclusions: 1. Soil erosion processes go on with the same intensity as they went in the beginning of the 20-th century. 2. With the influence o factors some hill tops were lowered and the valley bottoms were f f the atmospherical and anthropological Figure 4. Plots with high erosion intensity has high ground surface change factor (see legend on poster) raised. Amplitude of this change amounts up to 4m (Fig. 4). 3. General tendency of ground flattening can be clearly seen. Rain water moves soil particles down the slope and then deposi- ted material is further moved away from the basin. 4. Erodibility of the Dublany loess soils is very high and it is furthermore strengthen by agrotechnical measures (tillage). Plots on still cultivated slopes are the most severely eroded. 5. Unproper agricultural practices (e.g. up and down tillage) and lack of applied conservation methods in the past decades might have had an influence to speed up the soil degradation. 6. Significant change of the landcover and land-use occured during the investigated period. After 72 years the percentage of built-up area considerably increased. These changes seem to have a serious impact on the ground surface level. In these circumstances, it might be worthy to note that precise determination of all factors responsible for ground displace- ment over particular locations is simply impossible due to the aforementiond antropogenic changes of the landcover and the land-use. 4. COMPLEMENTARY ANALYSIS [n the second part of the project the quantitative results of photo- grammetric measurements were compared with the results based on the one of the most popular and widely used soil loss models — USLE (Universal Soil Loss Equation), which was applied to the same area. This analysis led the author to verify the effec- tiveness of the USLE assessment of the average soil erosion. Data model has been set up on the basis of the precipitation data, topographic information (slope lenght and inclination) , soil erodibility maps, land cover and landuse maps. The model was previously adapted and validated in the south-eastern Poland in '80 and '90. AIL information layers available for Dublany test- 124 Int Si th c gi

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