scholarly journals Distribution of Mutagen Formation Potential in Nationwide River Waters in Japan and Relationship with General Water Quality or River Basin Characteristics

2007 ◽  
Vol 30 (8) ◽  
pp. 433-440 ◽  
Author(s):  
Toshiya KOMATSU ◽  
Yoshiaki MANABE ◽  
Shuji HIMENO ◽  
Arata HARADA ◽  
Michio MURAKAMI ◽  
...  
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Formation Potential ◽  
River Waters

scholarly journals Hydroecological monitoring of the quality of river waters of the Amudarya river basin in the territory of Uzbekistan

2019 ◽  
Vol 01 (01) ◽  
pp. 12-18
Author(s):  
CHembarisov Elmir Ismailovich ◽  
Mirzakobulov ZHahongir Bahtiyarovich ◽  
Rahimova Matluba Naimovna ◽  
Rasulov Bahadyr Olim ◽  
Tillaeva Zarina Umarovna
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Surface Waters ◽  
Irrigated Agriculture ◽  
Irrigation Water Quality ◽  
Quality Performance ◽  
River Waters ◽  
The Republic ◽  
Scientific Base

The article considers the problems of irrigation water quality in Central Asia through hydroecological monitoring. Practical and scientific recommendations for solving these problems are offered. There are noted the necessity of development of scientific base of researches on all aspects of water quality and protection of water resources; adoption of laws and administrative documents on protection of waters and improvement of their quality; performance of various engineering, technological actions. The hydroecological state of surface waters of large irrigated areas of the Amudarya river basin was studied for regieon: Surkhandarya, Kashkadarya, Khorezm and irrigated zones of the Republic of Karakalpakstan. It is noted that the process of salinization of irrigated lands is dangerous for the region. According to the calculations 50...55 million tons of various salts are came to irrigated annually fields. This is the reason for the deterioration of the hydrological state of irrigated agriculture in the region.

scholarly journals Microelement Structure of the Cherek-Bezengiysky River Water

2017 ◽  
Author(s):  
Keyword(s):  
Water Quality ◽  
River Water ◽  
River Basin ◽  
Caspian Sea ◽  
High Mountain ◽  
Clean Water ◽  
Mountain Regions ◽  
The Caspian Sea ◽  
The Caucasus ◽  
River Waters

Urgency of the issues concerning studying water quality in mountain-glacial high-mountain regions of the Caucasus where the rivers feeding the Kabardino-Balkar Republic lowland parts originate has been highlighted. The Bezengiysky Canyon river waters have been investigated for Mn, Zn, Cu, Pb, Ag, Ni, Cr, and Cd content. The high-mountain glacial/mountain fed Cherek Bezengiysky River microelements’ concentration values have been compared from the source to the mouth both during winter low-water and glacial flood periods. It has been stated that river water microelements contamination in the high-mountain region is caused by natural geochemical and geo/morphological background and is connected with the microelements washing out mountain rocks. Earlier investigations have shown that the microelements concentration significantly drops in comparison with the upper reach when the river enters the lowlands. It was found that the Cherek Bezengiysky River waters under study in terms of Mn, Pb, Cr, Cd, Ni, Cu, and Ag content could be classified as clean water excluding Zn which made the water very polluted. Minimal, maximal and average values of the main ion and nitrogen-containing substances concentrations during winter low-water and glacial flood periods have been presented. The value of the conducted investigation is determined by the fact that the Cherek Bezengiysky River inflows to the Terek River and forms the Caspian Sea river basin.

Characteristics of Water Quality in Tributaries of the Sumjin River Basin

2017 ◽  
Vol 18 (6) ◽  
pp. 563-570
Author(s):  
Se Chang Son ◽  
Dae Hoon Kim ◽  
Jae Chun Lee ◽  
Jae Young Jae Young ◽  
Ki Wan Lee ◽  
...  
Keyword(s):  
Water Quality ◽  
River Basin

Water Quality Characteristics for Agricultural Reservoirs in Yeongsan River Basin

2020 ◽  
Vol 21 (1) ◽  
pp. 15-23
Author(s):  
Sang-Guen Oh ◽  
Jae-Young Lee ◽  
Jae-Woon Jung ◽  
Ju-Tae Song ◽  
Sang-Yun You ◽  
...  
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Quality Characteristics

Water Quality in the Yakima River Basin, Washington, 1999-2000

Circular ◽  
2004 ◽  
Author(s):  
Gregory J. Fuhrer ◽  
Jennifer L. Morace ◽  
Henry M. Johnson ◽  
Joseph F. Rinella ◽  
James C. Ebbert ◽  
...  
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Yakima River
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