Impact of climate change on Lake Chamo Water Balance, Ethiopia

A huge number of scientific researches in the world are devoted to the research of global and regional climate change and their impact on water resources. In Ukraine, this issue is receiving insufficient attention. Researches have been done to assess current trends in river runoff, but future estimates of changes in Ukraine’s water flow have been presented in only a few papers. Present studies of this issue are conducted using hydrological modeling. The ensemble approach is widely used to increase the reliability of estimates of possible future changes in water runoff, that is, the use of data from several GCM and RCM models, with subsequent averaging of their results. Unfortunately, this methodological approach was not used in Ukraine. Using the water-balance method, local manifestations of global climate change within individual catchments can be estimated with sufficient quality. To estimate the temporal variability of the components of the water balance, a comparison of the available hydrological and climatic characteristics of the current period with the period of the climatic norm is used, as well as the method of differential integral curves, which reflects characteristic tendencies in the long-term dynamics of individual components of the water balance. Analyzing all available approaches to research on the impact of climate change on water flow, we can conclude that a complex method is the best for this investigation. Given that a large number of methods are used in the world, reliable estimates can be obtained by developing unified and validated methods and techniques. Therefore, the first step in this way should be a comparative analysis of the results obtained by the most commonly used methods. In the field of water, climate change can lead to changes in rainfall, hydrodynamic regime and water balance of rivers, increase of catastrophic floods and excessive drought, shortage of fresh water. Unfortunately, there is insufficient attention paid to the study of this issue in Ukraine. That is why assessing the impact of climate change on water flow and forecasting them is a very necessary task.

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Correction: Kamruzzaman, M., et al. Evaluating the Impact of Climate Change on Paddy Water Balance Using APEX-Paddy Model. Water 2020, 12, 852

Water ◽

10.3390/w12041221 ◽

2020 ◽

Vol 12 (4) ◽

pp. 1221

Author(s):

Mohammad Kamruzzaman ◽

Syewoon Hwang ◽

Soon-Kun Choi ◽

Jaepil Cho ◽

Inhong Song ◽

...

Keyword(s):

Climate Change ◽

Water Balance ◽

Impact Of Climate Change ◽

Paddy Water ◽

The Impact ◽

Model Water

The authors wish to make the following corrections to this paper [...]

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PROJECTION OF THE IMPACT OF CLIMATE CHANGE ON THE SURFACE ENERGY AND WATER BALANCE IN THE SEYHAN RIVER BASIN TURKEY

PROCEEDINGS OF HYDRAULIC ENGINEERING ◽

10.2208/prohe.50.31 ◽

2006 ◽

Vol 50 ◽

pp. 31-36 ◽

Cited By ~ 2

Author(s):

Kenji TANAKA ◽

Yoichi FUJIHARA ◽

Tsugihiro WATANABE ◽

Toshiharu KOJIRI ◽

Shuichi IKEBUCHI

Keyword(s):

Climate Change ◽

Surface Energy ◽

Water Balance ◽

River Basin ◽

Impact Of Climate Change ◽

The Impact

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Evaluating the Impact of Climate Change on Paddy Water Balance Using APEX-Paddy Model

Water ◽

10.3390/w12030852 ◽

2020 ◽

Vol 12 (3) ◽

pp. 852 ◽

Cited By ~ 2

Author(s):

Mohammad Kamruzzaman ◽

Syewoon Hwang ◽

Soon-Kun Choi ◽

Jaepil Cho ◽

Inhong Song ◽

...

Keyword(s):

Climate Change ◽

Water Balance ◽

Maximum Temperature ◽

Climate Change Scenarios ◽

Climate Scenarios ◽

Water Balance Components ◽

Impact Of Climate Change ◽

Paddy Water ◽

Significant Difference ◽

The Impact

This research aims to assess the impact of climate change on water balance components in irrigated paddy cultivation. The APEX-Paddy model, which is the modified version of the APEX (Agricultural Policy/Environmental eXtender) model for paddy ecosystems, was used to evaluate the paddy water balance components considering future climate scenarios. The bias-corrected future projections of climate data from 29 GCMs (General Circulation Models) were applied to the APEX-Paddy model simulation. The study area (Jeonju station) forecasts generally show increasing patterns in rainfall, maximum temperature, and minimum temperature with a rate of up to 23%, 27%, and 45%, respectively. The hydrological simulations suggest over-proportional runoff–rainfall and under-proportional percolation and deep-percolation–rainfall relationships for the modeled climate scenarios. Climate change scenarios showed that the evapotranspiration amount was estimated to decrease compared to the baseline period (1976–2005). The evaporation was likely to increase by 0.12%, 2.21%, and 7.81% during the 2010s, 2040s, and 2070s, respectively under Representative Concentration Pathway (RCP)8.5, due to the increase in temperature. The change in evaporation was more pronounced in RCP8.5 than the RCP4.5 scenario. The transpiration is expected to reduce by 2.30% and 12.62% by the end of the century (the 2070s) under RCP4.5 and RCP8.5, respectively, due to increased CO2 concentration. The irrigation water demand is generally expected to increase over time in the future under both climate scenarios. Compared to the baseline, the most significant change is expected to increase in the 2040s by 3.21% under RCP8.5, while the lowest increase was found by 0.36% in 2010s under RCP4.5. The increment of irrigation does not show a significant difference; the rate of increase in the irrigation was found to be greater RCP8.5 than RCP4.5 except in the 2070s. The findings of this study can play a significant role as the basis for evaluating the vulnerability of rice production concerning water management against climate change.

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