What are the factors that make the findings of the stream under study different from the...

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  • What are the factors that make the findings of the stream under study different from the characteristic feature of an ideal streamDiscussion Topic:

  • Differences between stream under study and ideal stream (upper course)

  • Differences between stream under study and ideal stream(upper course)Next

    Stream under studyIdeal stream1.DischargeRelatively largerVery Small2.WidthWider v-shaped river bedSharp V-shaped river bed3.DepthDeeper than middle courseShallow4.Width-deep ratioLargersmaller

  • Differences between stream under study and ideal stream(upper course)Next

    Stream under studyIdeal stream5.Pebble roundnessPartly polished river loadAngular river load

    6.GradientGentleVery steep7.VelocityRelatively higherLow

  • Differences between stream under study and ideal stream(upper course)Next

    Stream under studyIdeal stream8.Water flowLess turbulentTurbulent with eddies9.Special featureNo pot hole is found.Uneven river bed, due to abrasion, and forms pot holes.

  • Sharp V-shape

  • Differences between stream under study and ideal stream (middle course)

  • Differences between stream under study and ideal stream(middle course)Next

    Stream under studyIdeal stream1.DischargeSmaller than upper courseMedium2.WidthRelatively wider than upper courseBoard V-shaped3.DepthLess deep than upper courseMedium deep

  • Differences between stream under study and ideal stream(middle course)Next

    Stream under studyIdeal stream4.Pebble roundnessAngular river load can be foundPolished river load

    5.GradientVery gentleGentle but steeper than lower course6.VelocityLower than upper course Medium

  • Differences between stream under study and ideal stream(middle course)Next

    Stream under studyIdeal stream7.Water flowMore calmLess turbulent8.Special featureErosion and deposition take place

  • Erosion at outer bankDeposition at inner bank

  • Erosion at outer bank

  • Deposition at inner bank

  • Differences between stream under study and ideal stream (Lower course)

  • Differences between stream under study and ideal stream(Lower course)Next

    Stream under studyIdeal stream1.DischargeSmaller than middle course (site 6)Large2.WidthNarrower than site 5 Wide3.DepthLess deep than middle courseDeep4.Width-deep ratioSite 6s ratio is less than site 5s.

  • Differences between stream under study and ideal stream(Lower course)Next

    Stream under studyIdeal stream5.Pebble roundnessRiver load deposited due to construction of dykes.Polished and round river load

    6.Hydraulic radiusSite 6s radius is less than site 5s.Lower the course, higher the radius is.7.VelocityLower than upper course Medium

  • Differences between stream under study and ideal stream(Lower course)Next

    Stream under studyIdeal stream8.Special featureDykes are built.

  • Dykes narrowing the lower course.

  • Why the chosen stream is different from the ideal stream ??Human Factor !!

  • Human FactorThe chosen stream sections in Pak Tam Chung modified by human -Bumping station-Construction work-Weit-Holiday Village-Catchwater

  • Human FactorDISCHARGE-Upper course smaller dischargeCatchwater() built up, more discharge because of the water collectionWeir() block the water flow, it smaller the discharge-Middle course greater discharge The Holiday Village s drainage system collect to the river, increase the discharge Weir block the water flow, it smaller the discharge-Lower course discharge decrease The bumping station bump the water away