Water quality assessment of Salang-Langka River in Cabuyao, Laguna as a source of irrigation water

Date

10-1993

Degree

Bachelor of Science in Chemistry

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Nieva T. Librojo-Basilio

Abstract

The quality of water in Salang-Langka river in Cabuyao, Laguna was evaluated for four months as a sources of irrigation water. The different parameters analyzed were pH, temperature, chloride, total dissolved solids, total phosphorus, and the major cations as sodium, potassium, magnesium and calcium.

Temperature and pH readings were taken at the time of sampling. The concentrations of chloride and total phosphorus were determined by volumetric and colorimetric methods of analysis. Total dissolved solids were analyzed using the oven-drying. Analyses of the major cations were carried out using atomic absorption and flame emission spectrophotometry.

The values of temperature and pH ranged from 28 to 34oC and 6.17 to 7.78, respectively. Total dissolved solids gave values in the range of 352 to 1343 ppm. Total phosphorus was observed to be in the range of 11.78 to 53.50 ppm. The choloride concentrations, an indicator of sewage pollutant, ranged from 21.33 to 136.73 ppm. All values obtained fall within the permissible levels for irrigation as set by the Department of Environmental and Natural Resources (1990).

The concentrations of soluble salts ranged from 147.75 to 282.50 ppm for sodium, 114.50 to 196.75 ppm for potassium and 105.20 to 185.00 for calcium. The sodium adsorption ratio ranged from 2.86 to 5.27 which indicates that there is no problem to soil salinity. Salinity hazard as caused by the presence of the soluble salts is within the permissible level for irrigation water (US Soil Salinity Laboratory), 1954).

Statistical analysis of data showed that there were significant effects due to sampling sites and date of sampling at 1% level.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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