Mathematical Model of the Water Quality in Tlogo Ampel Watershed

Hariono, Budi and Wijaya, Rizza and Wibowo, Michael Joko and Dian Widianta, Moh.Munih (2020) Mathematical Model of the Water Quality in Tlogo Ampel Watershed. Journal of Physics: Conference Series, 1569 (4). pp. 1-9. ISSN 1742-6588

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Abstract

The observation station of the study is placed at one point of Tlogo Ampel River in Wonokoyo Village, Kapongan Subdistrict, Situbondo Regency with location of 7°70'44 "South Latitude and 114°08'99" East Longitude. Tlogo Ampel River is one of the rivers that through the settlement of society and industry so that naturally experience of degradation of water quality. Sampling is done every month by the related institution that is Sampean River Basin Management Institute. To predict the value of water quality is needed mathematical model change the water quality of Tlogo Ampel watershed. The research parameters included pHysical properties (Temperature and TSS), organic chemical properties (pH, BOD, COD, DO, PO4P and NO3N) as well as microbiological properties (total coli and fecal coli). The results show the Polynomial equation of order 6 for parameters: temperature, TSS, pH, BOD, COD, DO, PO4P, NO3N, total coli and fecal coli respectively are : y = 0,0002x6 - 0,0078x5 + 0,1203x4 - 0,9031x3 + 3,4485x2 - 6,2299x + 27,595; y = -0,0027x6 + 0,1591x5 - 3,1236x4 + 27,249x3 - 108,22x2 + 157,53x + 46,997; y = 0,0002x6 - 0,0085x5 + 0,1342x4 - 1,0398x3 + 4,0441x2 - 7,4089x + 12,505; y = -0,0002x6 + 0,0032x5 + 0,0302x4 - 0,9626x3 + 6,8118x2 - 16,907x + 17,482; y = 0,0005x6 - 0,0328x5 + 0,7417x4 - 7,2595x3 + 31,838x2 - 55,407x + 47,365; y = -0,001x6 + 0,0406x5 - 0,6408x4 + 4,9244x3 - 18,785x2 + 31,901x - 11,853; y = -1E-05x6 + 0,0005x5 - 0,0098x4 + 0,0897x3 - 0,3839x2 + 0,6547x - 0,0902; y = 0,0004x6 - 0,0143x5 + 0,1694x4 - 0,9131x3 + 2,3917x2 - 3,2352x + 4,1306; y = 0,0035x6 - 0,269x5 + 6,3886x4 - 67,262x3 + 337,4x2 - 741,18x + 612,7; y = 0,0011x6 - 0,0963x5 + 2,2449x4 - 22,035x3 + 100,4x2 - 193,42x + 140,76

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