Shit Flow Diagram (SFD), Chunar

May 10, 2018

A Sanitation (or Shit) Flow Diagram presents a clear picture of how excreta flows are managed within the city. The diagram clearly depicts how excreta flows from user interface to the final disposal. It has the following stages:

Containment
➣ According to Census 2011, Chunar has coverage of 9% sewer network but during the field-based study, it was found that there is no functional sewer network. 
➣ Most of the households dependent on on-site sanitation systems either have septic tanks connected to open drain or lined pit.
➣ The size of the tanks and pits is based on the space available and affordability of the households. Due to no standardization being followed while constructing the containment system, few households have constructed septic tanks large in capacity irrespective of household size with the general perception of emptying the septic tanks only after an interval of 15-20 years. The newly constructed houses have septic tanks with proper baffle walls (Key Informant Interviews, 2016).

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