Fri. Jan 10th, 2025

Morphometry of Drainage Basins

  1. How is the average width between two successive contours calculated in De Smet’s clinographic curve method?

    Options:
    1. Aw = (L1 + L2) / 2
    2. Aw = Cl / (h + L)
    3. Aw = h x (L1 + L2) / 2
    4. Aw = Ad / Cl

    Option: A

  2. In the context of slope angles and heights, what does a curve line that is straight and parallel to the vertical axis signify?

    Options:
    1. Concavity
    2. Convexity
    3. Almost even slope in the basin
    4. Steep slope

    Option: C

  3. According to H. Baulig, what technique did he adopt for the study of hats and shoulders on valley sides due to successive lowering of sea levels?

    Options:
    1. Altitude analysis
    2. Contour analysis
    3. Altimetric analysis
    4. Topographic analysis

    Option: C

  4. What do altimetric frequency histograms and curves represent?

    Options:
    1. Frequencies of spot-heights only
    2. Frequencies of highest points in grid squares only
    3. Frequencies of areas of summits and benches only
    4. Frequencies of various altimetric features such as spot-heights, summits, and benches

    Option: D

  5. What is the contour interval that is most suitable for altimetric analysis?

    Options:
    1. 5m
    2. 10m
    3. 20m
    4. 50m

    Option: A

  6. What is the procedure for altimetric analysis?

    Options:
    1. Counting the number of spot heights and highest points only
    2. Measuring the area of summits and the length of shoulders and cols only
    3. Tabulating derived data in several height groups by using simple or running-sum-class intervals, and plotting the data along the ordinate and abscissa to draw frequency histograms and curves
    4. Counting the number of summits and benches only

    Option: C

  7. What are slopes in the context of landforms of a drainage basin?

    Options:
    1. Geological structures
    2. Absolute and relative reliefs
    3. Angular inclinations between hilltops and valley bottoms resulting from the combination of many causative factors
    4. Dissection index

    Option: C

  8. What is the technique put forth by K. Wentworth for the calculation of average slopes in degrees?

    Options:
    1. Contour analysis
    2. Altimetric analysis
    3. Topographic analysis
    4. None of the above

    Option: C

  9. What is relative relief?

    Options:
    1. The height difference between the highest and the lowest points in a basin
    2. The height difference between the highest and the lowest points in a unit area
    3. The vertical distance from a horizontal fairly flat upland down to the initial grade of the streams
    4. The quotient of maximum relief and basin perimeter

    Option: B

  10. Who first used the term ‘amplitude of relief’?

    Options:
    1. J. Maxwell
    2. M. Melton
    3. W.S. Glock
    4. De Smet

    Option: C

  11. What is the most suitable method for calculating relative relief within a basin?

    Options:
    1. Schemed method
    2. Grid method
    3. Real area and projected area method
    4. Volume and average slope method

    Option: B

  12. What is dissection index?

    Options:
    1. The ratio of maximum relative relief to the maximum absolute relief
    2. The ratio of the real area between two successive contours to the projected area between the same contours
    3. The ratio of relative altitude (relief energy) to the perpendicular distance from the erosion base
    4. The quotient of maximum relief and basin perimeter

    Option: A

  13. Who suggested the modification of the dissection index formula by including volume of relief and average slope?

    Options:
    1. De Smet
    2. Dov Nir
    3. Slaucitajs
    4. M. Melton

    Option: A

  14. What is the value range of dissection index?

    Options:
    1. 0 to 1
    2. 0 to 2
    3. 1 to 10
    4. 0 to infinity

    Option: A