Organochlorine insecticide residues in sediment from various types of land use in Bangpakong basin [Thailand]
1986
Rachen Muangkaeo
A study of 14 derivatives of organochlorine insecticide residues in sediment from Bangpakong river basin were conducted in April, August and December of 1984. The sediment in three main watersheds and seven subwatersheds were representatives of 4 different types of land uses, namely: forest, forest-agrocultural, upland agrocultural and lowland agrocultural area. Only 6 derivatives found were: dieldrin, heptachlor, heptachlor epoxide, HCB, aldrin and p-p'DDT. In general, the amount of dieldrin was 49.67 ppb which was significantly higher than the other derivatives in main Bangpakong river. Types of land uses contributed to the amount of residues. The highest residues were found as high as 32.39 ppb in lowland agrocultural area but only 11.08 ppb in forest-agrocultural area. The amount of rainfall affected the concentration of the0827 residues. The concentration of dieldrin was found to be 47.77 ppb during summer which was higher compared to that obtained in rainy season which was found 23.94 ppb. The concentration of the residue in the sediment was three times less than that found in the soil along the river but 1,160 times higher than that of the w
Show more [+] Less [-]AGROVOC Keywords
Bibliographic information
This bibliographic record has been provided by Thai National AGRIS Centre, Kasetsart University
