Development of mathematical model for assessment of environmental damages around the shitalakhya river in bangladesh

Abstract

Abstract : For the assessment of environmental damages around the study area, the related environmental parameters have been identified and subsequently data were gathered through focus group discussion, questionnaire survey, key informant’s information along with two case studies. Out of two Case Studies (CS); in Case Study-1 (CS-1), the gross income of a family was reported to be TK. 80,071.00 in 2005, TK. 71,261.00 in 2006 and TK. 63491.00 in 2007. In Case Study-2 (CS-2), the gross income of the respondent in 2005 was TK. 51,162.00 and in 2006 and 2007 were TK. 51,820.00 and TK. 59,034.00 respectively. The opportunity loss of the respondent at polluted area were TK. 43,270.00, TK. 45,680.00, TK. 50,075.00 during the year 2005, 2006 and 2007 correspondingly which was higher than the respondent of CS-1. The pollution load and chemical characteristics of water of the Shitalkhya River was rated as very low quality i.e. Water Quality Index was 17.89. Out of polluted river water the surrounding inhabitants of the study area are suffering from opportunity loss and subsequent increased expenditure with comparison to non- polluted area. Eventually the basic outcomes of information has been expressed in following mathematical model for assessment of environmental damages for a particular case: TL GO £ (DL+IL+EL) or, Equation-1 TL = K £ (DL+IL+EL) Equation-2 Where, TL- total loss, DL- direct loss, IL- indirect loss, EL- environmental loss,