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by
C. Sasaki |
Total Records (
2 ) for
C. Sasaki |
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B.K. Mitra
,
C. Sasaki
,
K. Enari
,
N. Matsuyama
and
S. Pongpattanasiri
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Groundwater quality is an inevitable factor for sustainable agriculture as a source of irrigation water. Therefore, the study was conducted in an irrigated sand dune area of northwest Honshu island in Japan to evaluate the groundwater quality for irrigation. Three observation wells were installed in the investigated field made of Poly Vinyl Chloride (PVC) pipe with three plastic tubes to collect groundwater of 2.0, 2.5 and 3.0 m. The sampling was performed every month from January to November, 2005. Assessment of groundwater quality was performed on the basis of Total Dissolved Solids (TDS), concentration of sodium (Na), calcium (Ca) and magnesium (Mg), Sodium Absorption Ratio (SAR), total hardness (HT) and concentration of phosphate phosphorus (PO4-P). Total dissolved solids in groundwater was ranged between 145.5-249.4 mg L-1 during the investigation period, revealed that irrigation using groundwater of the study area would not cause salinity hazards. Cocentrations of Na, Ca and Mg were decreased with depth throughout the investigation period. The average concentration of Na and SAR value were 18.8 mg L-1 and 0.81, respectively. Since groundwater of the study area contained low concentration of Na with low SAR values, there would not be any possibility of sodium hazards from irrigation using groundwater. On average groundwater of the study area contained 27.5 mg L-1 Ca and 9.35 mg L-1 Mg, which might contribute to moderate hardness of groundwater in the study area. |
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B.K. Mitra
,
C. Sasaki
,
K. Enari
,
N. Matsuyama
and
S. Pongpattanasiri
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This study was conducted to evaluate the groundwater quality in sand dune area of northwest Honshu island, Japan. Three observation wells were installed with three plastic tubes to collect ground water of 2.0, 2.5 and 3.0 m depth. Groundwater samples were analyzed for EC, pH, DO, concentration of Fe, K and NO3-N during the period of April, 2004 to March, 2005. Groundwater level and soil environment from 0.1 m through 3.0 m was also evaluated. The groundwater level of the study field was observed within a range of 114.43 to 169.33 cm below ground surface. The results showed that EC, pH, DO and K concentration in groundwater were decreased with increasing depth whereas the opposite trend was observed for Fe. The groundwater of the study area was found not to be suitable for irrigation since concentration of Fe was more than 5 mg L-1. Average concentrations of NO3-N in groundwater of the study area were 0.026 mg L-1. Since concentration of NO3-N was very low in groundwater, there would not be any threat to human health and environment. |
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