Settling Pond

Sedimentation Pond PENYALIRAN TAMBANG

Prosedur Rancangan Sedimentation Pond 1. 2. 3. !. #.

Hitung Surface Runo Volume Hitung peak inow discharge Hitung storage olume Retention "asin $epth of storage

Prosedur Rancangan Sedimentation Pond 1. Hitung Surface Run o Volume% V & ' ( 'H ( ) $engan

%

V & olume ' & runo coe*cient 'H& curah hu+an untuk design storm duration tertentu ) & luas catchment.

Prosedur Rancangan Sedimentation Pond 2. Hitung peak inow discharge ,-/ •

 –

metoda rasional •

•

•

•

 –

 –

%

-i & de0it ,m3s/ ' & koesien limpasan  & intensitas hu+an ,mmh/ ) & luas daerah ,km2/

4aksimum outfow % retention time & f ,sediment settling/

Prosedur Rancangan Sedimentation Pond



3. Hitung storage olume % Q0 Qi

S      = 1 −     V   

  Q     S  = V 1 −     Qi   0

S& ma(. storage olume in the reserior ,m 3/

Prosedur Rancangan Sedimentation Pond !. Retention "asin ,4engenal hukum Stokes dahulu/

Stokes 6aw

Stokes 6aw $rag=rictional =orce & =d "uo8anc8 =orce & > ?rait8 =orce & 7

U

=d @> & 7 =d & 7 A > =d & =g

W

7here % )ssume particle is t8pical as a 0all d & diameter of particle & d8namic iscosit8 of uid9 water in 2:' & 1.1 ( 1;< m2s v  & terminal elocit8 ρs & densit8 of particle • • •

•

•

Prosedur Rancangan Sedimentation Pond !. Retention "asin •

agar semua partikel dengan kecepatan pengendapan B Vs dapat di0uang % Vs &

 –

 –

 –

C

Prosedur Rancangan Sedimentation Pond #. $epth of storage •

C 1.# m D h D ! m  Eika % h D h min h F h min

 S diu0ah  ) diu0ah

•



•

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Penting : •

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Ruang 8ang tersedia Pan+ang le0ar & 3 % 1 ,minimal/ Hindari short circuit

4aintenance • •

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Volume Solid ,t/ & -i ( G settled solidsediment

4aintenance

4aintenance