scholarly journals Relationship between the Water Quality of River Waters Flowing into Lake Biwa and the Geological Environment of the Riverheads.

1993 ◽  
Vol 54 (1) ◽  
pp. 3-10 ◽  
Author(s):  
Fuji MORII ◽  
Takeko MATSUMURA-INOUE ◽  
Yosimi TANAKA
Keyword(s):  
Water Quality ◽  
Lake Biwa ◽  
Geological Environment ◽  
River Waters

scholarly journals Chemical and ecological studies for water quality of Lake Biwa

1976 ◽  
Vol 12 (1) ◽  
pp. 22-26
Author(s):  
Susumu HASHIMOTO ◽  
Masanori FUJITA ◽  
Kenji FURUKAWA
Keyword(s):  
Water Quality ◽  
Lake Biwa ◽  
Ecological Studies

Estimation of urban nonpoint source pollution in Lake Biwa Basin

1998 ◽  
Vol 38 (10) ◽  
pp. 157-163 ◽  
Author(s):  
Atsushi Ichiki ◽  
Toshiyuki Ohnishi ◽  
Kiyoshi Yamada
Keyword(s):  
Water Quality ◽  
Environmental Management ◽  
Nonpoint Source Pollution ◽  
Lake Biwa ◽  
Nonpoint Source ◽  
Storm Events ◽  
Valuable Data ◽  
Nonpoint Sources ◽  
Pollutant Runoff

This study aims to simulate pollutant runoff into Lake Biwa using the Macro Model and examine the runoff characteristics of pollutants from urban nonpoint sources. As a result of the simulations of all rivers flowing into Lake Biwa, the characteristics of urban nonpoint source pollution and the basic units of urban nonpoint pollutants in the Lake Biwa basin became clear. It was shown that the control of pollutant runoff from nonpoint sources during storm events was significant in order to protect the water quality of Lake Biwa. From these results, valuable data concerning the environmental management of the Lake Biwa basin was obtained.

scholarly journals Changes of Water Quality of Lake Biwa Caused by the Shortage of Water in 1994

1995 ◽  
Vol 23 ◽  
pp. 376-381 ◽  
Author(s):  
Sunao YAMANAKA ◽  
Naoki FUJIWARA ◽  
Noriko SANUKI ◽  
Yasumichi MATSUOKA ◽  
Tetsuya WAKABAYASHI ◽  
...  
Keyword(s):  
Water Quality ◽  
Lake Biwa

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 Changes of water quality in the Łutownia and Perebel rivers in the Białowieża Primeval Forest

2016 ◽  
Vol 77 (4) ◽  
pp. 380-388 ◽  
Author(s):  
Magdalena Janek
Keyword(s):  
Water Quality ◽  
Forest Cover ◽  
Limit Values ◽  
River Waters ◽  
Carbon And Nitrogen ◽  
Primeval Forest ◽  
Legal Standards ◽  
High Concentrations ◽  
Białowieża Primeval Forest

Abstract The aim of the study was to determine changes in water quality, including chemistry of outflow from two rivers: Łutownia and Perebel located in the Białowieża Primeval Forest. Water chemistry was investigated once in every three months in the years 2011-2014. Catchments differed in forest cover and habitat types. The results of the analysis of river waters were compared with the limit values for each class of water quality as settled by the legal standards. It was found that the quality of the water in rivers declined due to high concentrations of carbon and nitrogen organic forms. In general, there was observed a decrease of the concentration of organic nitrogen and an increase of the concentration of mineral nitrogen, especially in the Perebel catchment area.

scholarly journals The water quality of Lake Biwa-ko

1957 ◽  
Vol 19 (1) ◽  
pp. 1-22 ◽  
Author(s):  
Ken-ichirô NEGORO
Keyword(s):  
Water Quality ◽  
Lake Biwa

scholarly journals Water Quality of the Hodza River in the Area of Activity of PJSC “Machine-Building Plant” Electrostal

2021 ◽  
Vol 7 (1) ◽  
pp. 134-143
Author(s):  
Zh.S. Makakhaniuk ◽  
◽  
V.M. Zubkova ◽  
Keyword(s):  
Water Quality ◽  
Anthropogenic Impact ◽  
Temporal Analysis ◽  
Ammonium Nitrogen ◽  
Machine Building ◽  
River Waters ◽  
Spatio Temporal ◽  
Building Plant ◽  
Machine Building Plant

a spatio-temporal analysis of the main indicators of the water quality of the Hodza River, the change in time of water quality along the river under the conditions of anthropogenic impact is carried out. In general, the waters of the river are characterized as “extremely dirty”. Among the pollutants, iron and ammonium nitrogen compounds absolutely prevail. There is a tendency to some improvement in the quality of river waters downstream. In the upper reaches, the COD is 1.7 and 2.5 times higher than in the middle and upper reaches; BOD – 1.6 and 2.3 times, respectively.

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