Hydrological Components Variability under the Impact of Climate Change in a Semi-Arid River Basin

Zhang, Xuan; Yang, Xu; Hao, Fang; Li, Chong; Xiao, Wang

doi:10.3390/w11061122

Cited by 16 publications

(8 citation statements)

References 37 publications

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“…Although the GWC increases with increasing temperature, the magnitude of change is smaller than that of changing precipitation, indicating that the impact of the temperature on the GWC is significantly lower than that of precipitation. The same findings can be found in the studies of Jones et al [32], Yuan et al [7], and Zhang et al [33]. These studies also concluded that precipitation .…”

Section: Impact Of Climate Change On Blue and Green Water Flowsupporting

confidence: 83%

Impacts of Climate Change on Blue and Green Water Resources in the Middle and Upper Yarlung Zangbo River, China

Huo

Zhu

et al. 2021

Atmosphere

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The Yarlung Zangbo River is the largest river on the Tibetan Plateau and a major international river in South Asia. Changes in the blue and green water resources in its basin are of great importance to the surrounding local and Asian regions in the context of global warming. This research used the Soil and Water Assessment Tool model to estimate blue and green flows (BWF and GWF) and analyze the spatial-temporal distribution characteristics under different hypothetical climate change scenarios. The results show that (1) the multi-year average BWF in the middle and upper reaches of the Yarlung Zangbo River Basin is 176.2 mm, the GWF is 213.1 mm, and the difference between precipitation and total water resources is only 5.4 mm; (2) both BWF and GWF in this basin showed a slightly increasing trend from 1980 to 2010, but the distribution of subbasins from upstream to downstream is decreasing; and (3) GWF has a positive correlation with both precipitation and temperature, but BWF only increases with precipitation and decreases with increasing temperature. Moreover, the change in blue and green water resources is more sensitive to the changes in precipitation than to changes in the temperature.

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Section: Impact Of Climate Change On Blue and Green Water Flowsupporting

confidence: 83%

Impacts of Climate Change on Blue and Green Water Resources in the Middle and Upper Yarlung Zangbo River, China

Huo

Zhu

et al. 2021

Atmosphere

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“…The elevation ranges from 3 to 2241 m and decreases from the mountainous areas in the northwest to a plain in the southeast. The LRB is situated in a typical temperate continental monsoonal zone with semi-arid climate [17], where is more sensitive to climatic and anthropogenic disturbance. The study catchment has an annual temperature fluctuating from 0 • C to 9.0 • C and 478.5 mm of average annual precipitation.…”

Section: Study Areamentioning

confidence: 99%

Response of Vegetation to Changes in Temperature and Precipitation at a Semi-Arid Area of Northern China Based on Multi-Statistical Methods

Zhang

et al. 2020

Forests

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Hydrothermal and climatic conditions determine vegetation productivity and its dynamic changes. However, the legacy effect and the causal relationships between these climatic variables and vegetation growth are still unclear, especially in the dry regions. Based on multi-statistical methods, including bivariate correlation analysis and composite Granger causality tests, we investigated the correlation, causality, and lag length between temperature/precipitation and the vegetation growth (Normalized Difference Vegetation Index, NDVI) in three typical sub-watersheds in the Luanhe River Basin, China. The results show that: (1) Precipitation and temperature are the Granger causes of NDVI variation in the study catchment; (2) temperature and precipitation are not strictly positively correlated with NDVI during growing seasons along with the whole sequence, and excessive warmth and precipitation inhibits vegetative growth; (3) the lag length of vegetation growth in response to temperature/precipitation was shorter in agriculture areas (~2 months) than the forest-dominant area, which have indicated 3-4 months lag length; and (4) anthropogenic disturbance did not result in notable negative effects on vegetation growth at the Luanhe River Basin. Our study further suggests that use of these multi-statistical methods could be a valuable approach for comprehensively understanding the correlation between vegetation growth and climatic variations. We have also provided an avenue to bridge the gaps between stationary and non-stationary sequence, as well as to eliminate pseudo regression problems. These findings provide critical information for developing cost-efficient policies and land use management applications for forest conservation in arid and semi-arid area.

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“…Ressalta-se que os impactos provocados por essa variabilidade, mesmo dentro do aguardado pode ter representações expressivas nas atividades humanas. Também é admissível mencionar que as regiões classificadas como semiáridas, em geral, apresentam grande variabilidade do clima, como é o caso das áreas semiáridas do Brasil (Huang et al, 2016;Schmidt et al, 2018;De Medeiros et al, 2019;Zhang et al, 2019).…”

Section: Introductionunclassified

Classificação de áreas semiáridas e subúmidas secas utilizando diferentes índices climáticos

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Matsunaga

Nunes

et al. 2021

Rev. Bras. Geog. Fis.

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As delimitações das áreas semiáridas do Nordeste do Brasil e norte de Minas Gerais podem apresentar grandes diferenças conforme os métodos de classificação climática e de estimativa da evapotranspiração potencial (ET0) utilizados. Para demostra esta afirmação de forma quantitativa, nesta pesquisa, delimitou-se as áreas semiáridas usando dois métodos de classificação climática (1) índice efetivo de umidade de Thornthwaite (Im) e (2) índice de aridez do Programa das Nações Unidas para o Meio Ambiente (IaUNEP), enquanto, para a estimativa da ET0 usou-se os métodos de (1) Thornthwaite e (2) Penman-Monteith-FAO (PMF), totalizando quatro diferentes configurações de delimitações de áreas semiáridas. Com a utilização de Im observou-se um aumento do grau de aridez e de áreas semiáridas quando comparado com os resultados obtidos com o uso de IaUNEP. Do mesmo modo, ao usar a estimativa de ET0 pelo método PMF verifica-se um aumento da aridez e das terras semiáridas em comparação com a ET0 calculada por Thornthwaite. Como o método PMF é geralmente reconhecido como um método padrão para estimativa da ET0. Portanto, é possível certificar que o grau de aridez e de terras semiáridas no Nordeste do Brasil são mais elevados do que aqueles mostrados nos estudos com a estimativa de ET0 por Thornthwaite. Classification of semi-árid and sub-humid sreas using different climate indexes A B S T R A C TThe delimitations of semi-arid areas in the Northeast of Brazil and northern Minas Gerais can present great differences according to the methods of climatic classification and estimation of potential evapotranspiration (ET0) used. To demonstrate this statement in a quantitative way, in this research, we used two different methods of climate classification: (1) the moisture index of Thornthwaite (Im) and (2) aridity index of the United Nations Environment Program (IaUNEP), as well as, two methods to estimate ET0: of (1) Thornthwaite and (2) Penman-Monteith-FAO (PMF), totaling four different configurations of delimitations of semi-arid areas. As the use of Im an increase in the degree of aridity and semi-arid areas was observed when compared with the results obtained as the use of IaUNEP. Similarly, when using the ET0 estimate using the PMF method, there is an increase in aridity and semi-arid land compared to the ET0 calculated by Thornthwaite. As the PMF method is generally recognized as a standard method for estimating ET0. Therefore, it is possible to affirm that the degree of aridity and semi-arid lands in Northeast Brazil are higher than those shown in studies with the estimate of ET0 by Thornthwaite. Keywords: Semiarid, climatic classification, potential evapotranspiration

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Hydrological Components Variability under the Impact of Climate Change in a Semi-Arid River Basin

Cited by 16 publications

References 37 publications

Impacts of Climate Change on Blue and Green Water Resources in the Middle and Upper Yarlung Zangbo River, China

Impacts of Climate Change on Blue and Green Water Resources in the Middle and Upper Yarlung Zangbo River, China

Response of Vegetation to Changes in Temperature and Precipitation at a Semi-Arid Area of Northern China Based on Multi-Statistical Methods

Classificação de áreas semiáridas e subúmidas secas utilizando diferentes índices climáticos

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