h h h h
1. Erosionhishthehprocesshwherehsoilhparticleshare or
h andhputhinhmotion.h(Unith1):hAns-hhDislodged;hdetached
2. Sedimentationhishthehprocesshwherebyhdetachedhparticleshare
h elsewhere.h(Unith1):hAns-hhDeposited
3. Sedimenthishsolid or
particulatehmatterhthathhashbeenhremovedhfromhitshsitehofhoriginhby
, ,hor
andhdepositedhelsewhere.h(Unith1):hAns-hhMineral;horganic;hwater;hwind;hgravity
4. Acceleratedherosionhishahspeedinghuphofherosionhduehto
activity.h(Unith1):hAns-hhHuman
5. Majorherosivehforcesharehwaterhand .h(Unith1):hWind
6. Inhsomehareas,hmorehsoilhishlosthfrom
erosionhthanhfromhwaterherosion.h(Unith1):hAns-hhWind
7. Theheffectshof erosionharehusuallyhmorehvisiblehthan
h erosion.h(Unith1):hAns-hhWater;hwind
8. Thehthreehcategorieshofhoverlandherosionhare:h(Unith1):hAns-hhSheet,hrill,hgully
9. h
erosionhishthehremovalhofhahuniformhlayerhofhsoilhfromhrain-
splashhandhstormhwaterhrunoff.h(Unith1):hAns-hhSheet
10. The
1h/h12
, ofherosionhdefineshthehdifferencehbetweenhrillshandhgullies.h(Unith1):hAn
s-hhhDepth
11. Thehphysicalhfactorshaffectingherosionhare:h(Unith1):hClimate,hvegetativehcover,h
soils,hslope.
12. Erosionhandhsedimentationhmayhcause:
-Losshofhh h
-h damagehtohroads,hbuildingshorhbridges.
-h ,hresultinghinhreductionhofhfishhh
h ,hreduced orhh h
hcapacity,hand costshtohmaintain .
-h loading.h(Unith1):h-hfertilehtopsoil
- Structural
- Deposition;hspawninghareas;hchannel;hstormhdrain;hincreased;hturbidity
- Pollutant
13. Thehclimatichfactorshthathstronglyhinfluenceherosionhandhrunoffhare
h amount, ,hand
.h(Unith1):hRainfall,hfrequency,hintensity.
14. Soilhpropertieshinfluencingherodibilityhinclude:h(Unith1):hTexture,hstructure,h
cohesion,hnaturalhdrainagehclass
15. Texturehrefershtohthe or of
h ofhsoilhparticleshinhsoil.h(Unith1):hSize;hcombinationhofhsizes
2h/h12
, 16. Structurehrefershtohthehdegreehtohwhichhindividualhsoilhparticles
h toheachhother.h(Unith1):hAdhere
17. Slope , ,hand
h affectherodibility.h(Unith1):hSteepness,hlength,handhrough-
ness.
h
18. Sedimenthdepositionhoccurshwhenhsoil-ladenhwindhorhwaterhh
enoughhtohallowhthehsoilhparticleshtohsettlehout.h(Unith1):hSlows
h
19. The , ,hand ofhthehtrans-
portedhparticleshinfluencehthehratehathwhichhtheyhsettlehout.h(Unith1):hSize,hshape,h
h
andhdensity.
20. Smaller,hlighterhparticleshsuchhas
particleshareheasilyhtransportedhandhare tohsettlehout.h(Unith1):hClay-
sized;hslow/difficult
21. ThehFivehPrincipleshofhErosionhandhSedimentationhControlhare:
- thehdevelopmenthtohfiththehnaturalhsitehconditions
-Exposehthe practicalhareahforhthe pos-
siblehtime
h
-Applyhh h
preventionhpracticeshashfirsthlifehofhdefense
-Apply controlhpracticeshtohpreventhoff-sitehsedimenta-
tion
h
-Implementhahthorough , ,hand
h program.h(Unith1):h-hPlan
- Smallest;hshortest
- Soilherosion
3h/h12