1.
Title: “Responding to the Call of UN SDG 6 & 13: Introducing Rain Water Harvesting
   to Gusaling Villegas to Address Water Scarcity and Climate Change”
2. Wide front view of Gusaling Villegas while raining.
3. Zoom in to roof showing rainwater being collected sa gutters (still front view).
   Note that the roof of GV is like this :
4. Show rainwater flowing into downspouts. Since nasa loob ng columns, i-see through
   na lang yung columns. Yung downspout na ipakita ay preferably sa left of gitna ng
   building.
Gitnang column:
   5. Water enters catchbasin after downspout.
Catch Basin:
   6. Mag flow yung water pa right, dadaan sa iba pang catch basin, towards tank. Then
      from isang catch basin, mag flow out into pipe to first flush then multimedia filter
      then storage tank.
      Note: nasa loob ng soak away pit yung first flush for maintenance. First flush is
      sloped 5% and yung top ng soakaway pit ay ground level.
      Note: Yung multimedia filter ay inside ng another chamber (rectangular palalim with
      a depth of 25 inches, may outlet din po sa pinaka baba ng filter or sa bottom gilid ng
      filter for pipe papunta sa tank). Yung top ng chamber for multimedia filter ay ground
      level din tapos yung height ng multimedia filter mismo ay 10 inches.
      Note: tank is rectangular concrete and about 8 cubic meters. 4x2x1 meter.
First flush:
Rough Sketch:
CAD of drainage layout
Inside the tank:
   7. From tank, mag flow yung water through pipes using pump papunta sa isang
      comfort room for flushing and meron ding lalabas sa gripo. Then pag napuno yung
      tank mag overflow into soakaway pit.
Location of Tank and Comfort Room: