Trends of Hydroclimate Variables in the Upper Huai River Basin: Implications of Managing Water Resource for Climate Change Mitigation

Girma, Abel; Yan, Denghua; Wang, Hao; Song, Xinshan; Qin, Tianling; Dorjsuren, Batsuren; Gedefaw, Mohammed; Abiyu, Asaminew; Fikir, Dagim; Wang, Jianwei; Yadamjav, Otgonbayar

doi:10.1155/2020/8817068

Cited by 5 publications

(3 citation statements)

References 42 publications

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“…The innovative trend analysis method divides a time series into two equal parts and it sorts both subseries in ascending order [21,22]. Following that, the two halves are placed on a coordinate system : 1,2,3, … /2 on x-axis and : /2 1, /2 2, … on y-axis.…”

Section: Hydrometeorology Methodsmentioning

confidence: 99%

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Study on Relationship of Land Cover Changes and Ecohydrological Processes of the Tuul River Basin

et al. 2021

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The Tuul River Basin is the most important socioeconomic and political base area of Mongolia. Therefore, studying the interrelationships between changes in the ecohydrological processes of this basin and its land cover is of great importance for maintaining sustainability and the environment. This study investigated the annual average air temperature, total annual precipitation, and river discharge variability, and land cover changes at selected stations of the basin by using the hydrometeorological analysis, satellite analysis, and land cover determination statistical analysis. During the study period, the average annual air temperature rose from −1.5 °C to +0.3 °C (1.8 °C 361 °C). The average annual precipitation exhibits relatively low change during this period. River discharge varied during the study period. A significant decreasing trend in river discharge was observed at the Terelj (φ = −2.72) and Ulaanbaatar (φ = −5.63) stations, whereas the other stations, Altanbulag, Lun, and Orkhontuul, showed a significant increasing trend. During the study period, changes in land cover were directly related to main hydrometeorological parameters. Between 2000 and 2020, the amount of grassland decreased by 319.67 km2, while the area of water bodies increased by 28.36 km2. In the study area, mainly water bodies and sensitive areas of the land cover types were changed due to changes in precipitation. Studies in the arid and semiarid regions of Central Asia show that changes of ecohydrological processes have a significant impact on land cover changes.

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Section: Hydrometeorology Methodsmentioning

confidence: 99%

“…The trend magnitude is calculated by Sen's slope estimator methods [21,23]. The slope Q i between two data points is given by the equation:…”

Section: Hydrometeorology Methodsmentioning

confidence: 99%

Study on Relationship of Land Cover Changes and Ecohydrological Processes of the Tuul River Basin

et al. 2021

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“…As the air temperature rises, the amount and distribution of rainfall changed (Cooper, 2011;Nazeri Tahroudi et al, 2019). Variability in rainfall, temperature and other climatic variables have a significant impact on the variation of streamflow level and timing of hydrologic events (Girma et al, 2020;Orke and Li, 2021).These hydroclimatic variability and change significantly affects water resources with a consequence in various sectors activities such as hydropower generation, agricultural and industrial production, food security and socio economy (Ayehu et al, 2018;Esayas et al, 2018;Weldegerima et al, 2018). The impact will be higher on low income countries with limited institutional capacity, inadequate infrastructure and low technology to cope with the effects of hydroclimate variability and change (Asrat and Simane, 2017;Taye et al, 2015;IPCC, 2021).…”

Section: Introductionmentioning

confidence: 99%

Spatio-temporal variability and trends of hydroclimatic variables at Zarima Sub-Basin North Western Ethiopia

2022

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Globally, hydroclimatic variables have been changed due to human activities and have an impact on agricultural production and water resource management. This study investigated the spatio-temporal variability of hydroclimatic variables in Zarima subbasin using rainfall and temperature data from 1984 to 2018 and stream flow data from 1990 to 2014. The data were analyzed using the coefficient of variation, standardized anomaly index, Mann–Kendall trend and Sen’s slope estimator test. The results showed that rainfall, maximum and minimum temperatures of the Zarima subbasin varied spatially and temporally. The annual and Kiremit season rainfall and stream flow showed low to moderate variability (CV < 30%) whereas Bega and Belg season rain fall and stream flow showed high degree of variability (CV < 40%). The annual and Kiremit season rainfall showed relatively higher variability along the northern border of the subbasin. However, maximum temperature showed less degree of variability (CV < 10%) over the subbasin, whereas the annual and seasonal minimum temperatures showed less to moderate variability (CV = 2–28%). The minimum temperature showed moderate variability around the south east lower border of the subbasin on the annual time scale and the north east part of the subbasin during the Kiremit season. The Bega and Belg seasons mean minimum temperatures showed less to high degree of variability (CV = 0–40%). The south east lower part of the subbasin showed moderate to high variability during the Bega and Belg seasons. Results of a standardized anomaly index of the rainfall, temperature and stream flow confirmed that the sub basin experienced fluctuations between dry, wet, cool and warm years. The spatial representation of annual rainfall showed a statically significant increasing trend in some parts of the subbasin and an insignificant increasing trend in the majority of the subbasin up to 300 mm per decade, while the Bega and Belg seasons showed statistically insignificant increasing and decreasing trends. Kiremit season rainfall showed heterogenous results in both statistics and trend direction. The mean annual maximum showed an increasing trend from 0.35 to 0.9 °C. The Bega, Belg and Kiremit seasons' maximum temperatures increased by a range of 0.35 to 0.95 °C; 0.4 from 1.2 °C and 0.1 to 0.55 °C pre decade respectively. While the annual minimum temperature increased by 0.05 to 0.5 °C and decreasing trend by 0.1 to 0.3 °C around the south eastern part of the subbasin. The Bega and Belg season minimum temperatures increased up to 0.5 °C and 1 °C and temperatures decreased in the range of 0.1 to 0.5 oC per decade. The Kiremit season minimum temperature increased by a range of 0.05 to 0.5 °C. The annual, Bega, Belg and Kiremit season stream flow increased insignificantly by 0.32, 0.31, 0.02 and 0.68 mm3/s respectively. In general, the subbasin experienced hydroclimatic variability which affects the life of the people, agricultural production and the economy of the area. This needs further investigation for planning and management of water resource management for the success of future water resources projects.

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Innovative trend analysis for the streamflow sub-time series of the source Region of the Yangtze River

Ahmed,

Lü,

Adeyeri

2024

Theor Appl Climatol

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Trends of Hydroclimate Variables in the Upper Huai River Basin: Implications of Managing Water Resource for Climate Change Mitigation

Cited by 5 publications

References 42 publications

Study on Relationship of Land Cover Changes and Ecohydrological Processes of the Tuul River Basin

Study on Relationship of Land Cover Changes and Ecohydrological Processes of the Tuul River Basin

Spatio-temporal variability and trends of hydroclimatic variables at Zarima Sub-Basin North Western Ethiopia

Innovative trend analysis for the streamflow sub-time series of the source Region of the Yangtze River

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