Change in River Water Chemistry as Affected by the Confluence of Forest Drainage Water in Dairy Farming Area on Hokkaido Island, Northern Japan

2002 ◽  
Vol 7 (3) ◽  
pp. 131-136 ◽  
Author(s):  
Yasunori Nakagawa ◽  
Tadashi Nakashima ◽  
Kazunori Mawatari
Keyword(s):  
Water Chemistry ◽  
River Water ◽  
Dairy Farming ◽  
Drainage Water ◽  
River Water Chemistry ◽  
Farming Area ◽  
Hokkaido Island ◽  
Forest Drainage ◽  
Northern Japan

Linkages between catchment characteristics and river water chemistry at the locality scale in the Ikpoba River, Southern Nigeria

2020 ◽  
Vol 29 (1) ◽  
pp. 41-55
Author(s):  
D.A. Edokpa ◽  
J.O. Obieroma
Keyword(s):  
Water Chemistry ◽  
River Water ◽  
Water Resource Management ◽  
Multiple Scales ◽  
Nutrient Concentrations ◽  
River Catchment ◽  
River Water Chemistry ◽  
Catchment Characteristics ◽  
Southern Nigeria ◽  
Protection Strategies

This study explored the linkages between catchment characteristics (topography, land cover, soil and geology), average water chemistry (pH, calcium, magnesium, sulphate, nitrate, ammonium, orthophosphate, iron, zinc and lead) and rainfall in the Ikpoba River catchment, southern Nigeria, using statistical and locality-based GIS analyses. The results show that sites with high rainfall and percentage cover of arable and sand-gravel-clay lithologies were characterized by high acidity. There were strong links between average nutrient (𝑃𝑂43−-P, 𝑁𝐻4+-N and 𝑁𝑂3−-N) concentrations and diffuse agricultural sources in the catchment. Rainfall was strongly related to 𝑆𝑂42−, 𝑃𝑂43−-P and 𝑁𝐻4+-N suggesting that atmospheric deposition may influence their riverine concentrations. Results also suggest that decomposition of organic matter from forest stands was a significant driver of nutrient concentrations. Although metals (Fe2+ and Zn2+) were positively related to bedrock geology of sand-gravel-clay, there was no clear link between Pb2+ and the catchment characteristics investigated. Wetlands was found to be attenuating river water chemistry especially 𝑆𝑂42−, 𝑃𝑂43−-P and 𝑁𝐻4+-N concentrations. To underpin current environmental protection strategies, there is need to integrate a GIS-based analysis approach with monitoring data to fully identify the variability patterns in river water chemistry dynamics at local and multiple scales of water resource management in Nigeria. Key words: river catchment, water quality, metals, nutrients, GIS.

INFLUENCE OF RUNOFF OF INORGANIC IONS FROM FOREST AND ORCHARD ON RIVER WATER CHEMISTRY

2002 ◽  
Vol 46 ◽  
pp. 893-898
Author(s):  
Nobuyuki EGUSA ◽  
Tsutomu WASHIDA ◽  
Tatemasa HIRATA
Keyword(s):  
Water Chemistry ◽  
River Water ◽  
Inorganic Ions ◽  
River Water Chemistry

scholarly journals ¡Cuba! River Water Chemistry Reveals Rapid Chemical Weathering, the Echo of Uplift, and the Promise of More Sustainable Agriculture

GSA Today ◽  
2020 ◽  
Vol 30 (3) ◽  
pp. 4-10 ◽  
Author(s):  
Paul Bierman ◽  
Rita Yvelice Sibello Hernández ◽  
Amanda H. Schmidt ◽  
Héctor Alejandro Cartas Aguila ◽  
Yoelvis Bolaños Alvarez ◽  
...  
Keyword(s):  
Sustainable Agriculture ◽  
Water Chemistry ◽  
River Water ◽  
Chemical Weathering ◽  
River Water Chemistry

scholarly journals River Water Quality of Dairy Farming Area in Eastern Hokkaido

1995 ◽  
Vol 8 (3) ◽  
pp. 267-274 ◽  
Author(s):  
Tetuaki NAGASAWA ◽  
Takashi INOUE ◽  
Yasuharu UMEDA ◽  
Toshimi MUNEOKA
Keyword(s):  
Water Quality ◽  
River Water ◽  
Dairy Farming ◽  
River Water Quality ◽  
Farming Area
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