Land uses changes, CO emission and water pollution in kano metropolis Nigeria towards low carbon society

Abstract

The aim of the study is to assess environmental impacts of rapid urban growth in relation to land uses changes, air and water pollution towards low carbon society (LCS). Geographical Information System (GIS) was used for the land use analysis. The study covers 35 years from 1984 to 2019 Carbon monoxides sensing device (Gas Sensor By Crown Cone) was used within major and selected junction in Seven local government areas name; Tarauni, Nassarawo, Kumbotso, Fagge, Kano Municipal, Dala and Gwale respectively. Outdoor carbon monoxides were sensed in selected local governments based on the land uses interactions and 12 reading stations was sensed within the metropolis. The study also utilized secondary data obtained from available sources. The study of Land uses Changes indicate that agricultural land use significantly dropped down by (-49.94%) within 1984 to 1988, but in 1998-2019 it deeply dropped by (-84.90) while annual rate of agricultural land is (-3.57%) between 1984-1998 and 1998-2019 (-4.04). This revealed that the metropolis experienced rapid agricultural land reduction within the study period. On the other hand, the study show trend of changes of trans cape/irrigated land use within the study period of 1984-1998 shows an increased by (24.73) while it shifted down within the period of 1998-2019 with (-8.74). Its annual rates of Changes within 1984-1998 (1.77) and 1998-2019 (-0.42). The results of CO emission in Ppm shows that Tarauni ( Dangi Junction) is the most Polluted junction with the highest average emission of 19%, followed by Kumbosto (Sharad Junction) with an average of 15% of the total emission. In addition, Dala and Gwale proportionately recorded exact average values of 14%. Nassarawo and Fagge local governments also maintain the same average values of 13% but Kano municipal has the least average emission of 12%. The water pollution results show that the physio-chemical analysis, Shema Pond depicted colour of 290 PtCoU while Hauran Wanka Pond 501 PtCoU. T.Hardness records of the ponds are 0mg/l for Shema ponds while 0.16 mg/l for Hauran Wanki Pond. Suspended solid, the analysis depicted 248 mg/l was the record of Shema Pond while 61mg/l was for the Hauran Wanka Pond. It is strongly recommended based on the identified filed works issues to developed low carbon frame work that will be used as quality control within the metropolis.