scholarly journals On the generation and correction of deviation of biological integrity assessment for time-scale trend analysis: A case study of Songhua River Basin

2020 ◽  
Vol 32 (5) ◽  
pp. 1473-1483
Author(s):  
YIN Kun ◽  
◽  
LI Zhongyu ◽  
ZHAO Ran ◽  
WANG Yeyao ◽  
...  
Keyword(s):  
Trend Analysis ◽  
River Basin ◽  
Time Scale ◽  
Biological Integrity ◽  
Songhua River ◽  
Integrity Assessment ◽  
Songhua River Basin

Analysis of precipitation changes and its possible reasons in Songhua River Basin of China

2019 ◽  
Vol 11 (3) ◽  
pp. 839-864 ◽  
Author(s):  
Tianxiao Li ◽  
Zhaoqiang Zhou ◽  
Qiang Fu ◽  
Dong Liu ◽  
Mo Li ◽  
...  
Keyword(s):  
River Basin ◽  
Time Scale ◽  
Great Influence ◽  
Precipitation Change ◽  
Annual Precipitation ◽  
Human Beings ◽  
Songhua River ◽  
Songhua River Basin ◽  
Change Characteristics ◽  
Precipitation Changes

Abstract Changes in precipitation have a great influence on human beings. The study of precipitation can aid in understanding regional climate change characteristics and the hydrological cycle. Therefore, in this study, the standardized precipitation index is combined with a simple linear regression test, Mann–Kendall trend analysis, Sen's slope method, principal component analysis and partial correlation analysis to study precipitation and drought distributions in the Songhua River Basin and the causes of precipitation changes in this area. The results are as follows: (1) The average annual precipitation change in this area is not significant, but there are significant differences in seasonal precipitation changes. (2) On a long-term time scale, this area presents a wet trend from southeast to northwest. On a short-term time scale, spring and winter show a wet trend. Winter has changed significantly. Summer and autumn show a dry trend. (3) The average annual and rainy season (RS) precipitation shows step change characteristics. Precipitation change in RS is the main reason for annual precipitation change. (4) The Asian meridional circulation/zonal index have significant effects on precipitation and dry/wet changes in this area. The western Pacific subtropical high and the East Asian summer monsoon are also important factors in this area.

Complexity and trends analysis of hydrometeorological time series for a river streamflow: A case study of Songhua River Basin, China

2017 ◽  
Vol 34 (2) ◽  
pp. 101-111 ◽  
Author(s):  
M.A. Faiz ◽  
D. Liu ◽  
Q. Fu ◽  
M.U. Qamar ◽  
S. Dong ◽  
...  
Keyword(s):  
Time Series ◽  
River Basin ◽  
Songhua River ◽  
Songhua River Basin ◽  
Trends Analysis

Multi-index drought characteristics in Songhua River basin, Northeast China

2019 ◽  
Vol 78 (1) ◽  
pp. 1-19 ◽  
Author(s):  
MA Faiz ◽  
D Liu ◽  
Q Fu ◽  
F Baig ◽  
AA Tahir ◽  
...  
Keyword(s):  
River Basin ◽  
Northeast China ◽  
Songhua River ◽  
Multi Index ◽  
Songhua River Basin ◽  
Drought Characteristics

Runoff Fractal Dimension of Songhua River Basin in Harbin Station Based on Db4 Wavelet

2012 ◽  
Vol 550-553 ◽  
pp. 2537-2540
Author(s):  
Hai Yan Gu ◽  
Yong Wang ◽  
Lei Yu
Keyword(s):  
Time Series ◽  
Fractal Dimension ◽  
River Basin ◽  
Fractal Theory ◽  
Measurement Methods ◽  
Self Similarity ◽  
Songhua River ◽  
Songhua River Basin ◽  
The Songhua River Basin ◽  
The Songhua River

The wavelet analysis and fractal theory into the analysis of hydrological time series, fluctuations in hydrological runoff sequence given the complexity of the measurement methods--- fractal dimension. The real monthly runoffs of 28 years from Songhua River basin in Harbin station are selected as research target. Wavelet transform combined with spectrum method is used to calculate the fractal dimension of runoff. Moreover, the result demonstrates that the runoff in Songhua River basin has the characteristic of self-similarity, and the complexity of runoff in the Songhua River basin in Harbin station is described quantificationally.

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