scholarly journals Water problems in Lake Biwa and its catchment area.Development and problems of agricultural water utilization in the Lake Biwa catchment area.

1997 ◽  
Vol 26 (8) ◽  
pp. 508-512 ◽  
Author(s):  
Tsugihiro WATANABE
Keyword(s):  
Catchment Area ◽  
Lake Biwa ◽  
Agricultural Water ◽  
Water Utilization ◽  
Water Problems

scholarly journals How High-Quality Urbanization Affects Utilization Efficiency of Agricultural Water Resources in the Yellow River Basin under Double Control Action?

2020 ◽  
Vol 12 (7) ◽  
pp. 2869
Author(s):  
Xiling Zhang ◽  
Yusheng Kong ◽  
Xuhui Ding
Keyword(s):  
River Basin ◽  
Yellow River ◽  
Yellow River Basin ◽  
Utilization Efficiency ◽  
The Yellow River ◽  
Agricultural Water ◽  
High Quality ◽  
Water Utilization ◽  
Urban Rural ◽  
The Yellow River Basin

To promote the high-quality development of the Yellow River Basin, the total amount and intensity of agricultural water must be controlled. Further speaking, an urbanization development system should be established that is compatible with water resources and the water environment. We adopted the stochastic frontier analysis model to measure the agricultural water utilization efficiency of the Yellow River Basin from 2007 to 2017. We also adopted the dynamic panel difference generalized method of moments (GMM) and system GMM models to verify the driving factors, in which population urbanization, economic urbanization, and equilibrium urbanization levels were selected as the key variables. The results show that the overall efficiency of agricultural water utilization maintained a steady upward trend during the research period. The spatial differentiation was generally characterized by higher efficiency levels in the eastern region and lower levels in the western region. The variation coefficient of water utilization efficiency showed a downward trend in general, which indicates a space spillover effect. Agricultural water utilization efficiency continued to converge from 2007 to 2017, and the upper reaches area converged relatively more quickly. Regarding the influencing factors, the population urbanization, economic urbanization, balanced urbanization, crop planting ratio, and rice planting ratio had negative effects on agricultural water utilization efficiency. Urbanization did not positively affect agricultural water use efficiency as the related theories, so urbanization quality and urban–rural integration should be paid more attention. However, technology innovation was significantly positive in agricultural water utilization efficiency. The influencing factors of per capita water availability and annual precipitation did not pass the significance test. Therefore, the government should vigorously promote the development of high-quality new-type urbanization, scientifically formulate the scale and speed of urbanization, strengthen the urban, rural, and industrial integration, and promote the adjustment of planting structures and agricultural deep processing.

scholarly journals Influence of climatic warming on the amount of snow cover and water quality of Lake Biwa, Japan

1993 ◽  
Vol 18 ◽  
pp. 257-260
Author(s):  
Hiroji Fushimi
Keyword(s):  
Dissolved Oxygen ◽  
Snow Cover ◽  
Oxygen Concentration ◽  
Catchment Area ◽  
Lake Biwa ◽  
Deep Layer ◽  
Climatic Warming ◽  
Dissolved Oxygen Concentration ◽  
Average Amount

The amount of snow cover in the Lake Biwa catchment area has changed significantly from 1.9 × 1012kg in 1974 to 0.3 × 1012kg in 1979. The amount of snow cover was less in the warmer winter and when the amount of snow cover was less than 1012 kg, the average amount of snow cover in recent years, the lowest dissolved-oxygen concentration in the deep layer rapidly decreases. Climatic warming will significantly decrease the amount of snow cover in Lake Biwa catchment area and the dissolved-oxygen concentration in the deep layer of the lake, which may further enhance eutrophication of the lake.

scholarly journals Influence of climatic warming on the amount of snow cover and water quality of Lake Biwa, Japan

1993 ◽  
Vol 18 ◽  
pp. 257-260 ◽  
Author(s):  
Hiroji Fushimi
Keyword(s):  
Dissolved Oxygen ◽  
Snow Cover ◽  
Oxygen Concentration ◽  
Catchment Area ◽  
Lake Biwa ◽  
Deep Layer ◽  
Climatic Warming ◽  
Dissolved Oxygen Concentration ◽  
Average Amount

The amount of snow cover in the Lake Biwa catchment area has changed significantly from 1.9 × 1012kg in 1974 to 0.3 × 1012kg in 1979. The amount of snow cover was less in the warmer winter and when the amount of snow cover was less than 1012 kg, the average amount of snow cover in recent years, the lowest dissolved-oxygen concentration in the deep layer rapidly decreases. Climatic warming will significantly decrease the amount of snow cover in Lake Biwa catchment area and the dissolved-oxygen concentration in the deep layer of the lake, which may further enhance eutrophication of the lake.

Observation of snow water equivalent in the North catchment area of Lake Biwa

2011 ◽  
Vol 16 (3) ◽  
pp. 215-221 ◽  
Author(s):  
Iwaki Maho ◽  
Hida Yoshifumi ◽  
Ueno Ken’ichi ◽  
Saijyou Mayumi
Keyword(s):  
Catchment Area ◽  
Snow Water Equivalent ◽  
Lake Biwa ◽  
The North ◽  
Snow Water
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