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ESRISS Project www.sandec.ch/esriss TABLE OF CONTENTS 1 INTRODUCTION TO THE TOOL ......................................................................................................... 3 1.1 RATIONALE BEHIND THE TOOL ................................................................................................................... 3 1.2 COMPONENTS OF THE TOOL ..................................................................................................................... 4 1.3 APPLICATION ......................................................................................................................................... 4 2 MODEL DESCRIPTION ...................................................................................................................... 6 2.1 STRUCTURE OF THE MODEL ...................................................................................................................... 6 2.2 TREATMENT OF THE FIELD DATA ................................................................................................................ 7 2.3 CROSSCHECK AND ESTIMATION OF THE MOST SENSITIVE PARAMETERS ............................................................... 7 2.3.1 Number of inhabitants ............................................................................................................. 7 2.3.2 Sanitation system .................................................................................................................... 8 2.3.3 Water consumption ................................................................................................................. 9 2.3.4 Liquid animal manure ............................................................................................................11 2.3.5 Groundwater interaction .......................................................................................................12 2.3.6 Discharge location of greywater ............................................................................................13 2.4 RESULT: ESTIMATION OF WASTEWATER QUANTITY AND CHARACTERISTICS THROUGH A SIMPLIFIED MFA MODEL .....14 2.4.1 The MFA model ......................................................................................................................14 2.4.2 Simplification of the model: identification of the constant parameters ................................15 2.4.3 Precision of the estimation ....................................................................................................16 2.4.4 Calculation of the peaks.........................................................................................................18 3 POTENTIAL DEVELOPMENTS ......................................................................................................... 19 4 REFERENCES .................................................................................................................................. 20 APPENDIX .............................................................................................................................................. 21 ‐ STEP‐BY‐STEP PROCEDURE TO USE THE TOOL ‐ INTERVIEW GUIDE FOR VILLAGE AUTHORITIES AND REPRESENTATIVES ‐ HOUSEHOLD SURVEY QUESTIONNAIRE ‐ 2 ‐ September 2014