scholarly journals Changes of Rice Water Demand and Irrigation Water Requirement in Southeast China under Future Climate change

2012 ◽  
Vol 28 ◽  
pp. 341-345 ◽  
Author(s):  
Weiguang Wang ◽  
Fengchao Sun ◽  
Yufeng Luo ◽  
Junzeng Xu
Keyword(s):  
Climate Change ◽  
Irrigation Water ◽  
Water Demand ◽  
Water Requirement ◽  
Future Climate ◽  
Future Climate Change ◽  
Irrigation Water Requirement ◽  
Southeast China ◽  
Rice Water

scholarly journals Prediction of Rice Water Requirement Using FAO-CROPWAT Model in North Iran under Future Climate Change

2016 ◽  
Author(s):  
Javad Gilanipour ◽  
Bahram Gholizadeh
Keyword(s):  
Irrigation Water ◽  
Meteorological Data ◽  
Crop Coefficient ◽  
Water Requirement ◽  
Crop Water Requirement ◽  
Future Climate Change ◽  
Crop Water ◽  
Irrigation Water Requirement ◽  
Water Requirements ◽  
Rice Water

In this paper, Rice water requirement and irrigation water requirement in Amol agro meteorological Station in 2016-2045 are forecasted based on the projected meteorological data of Hadcm3 under A2 scenario. Rice water requirements are estimated by using crop coefficient approach. Reference evapotranspiration are calculated by FAO Penman-Monteith method. Moreover, the irrigation water requirements are simulated by calibrated CROPWAT model using the meteorological parameters. The results show that both crop water requirement and irrigation water requirement present downward trend in the future. In 2016-2045, the rice water requirement and irrigation water requirement decrease by more than 9.9% under A2 scenario, respectively. Furthermore, the precipitation rise may be the main reason for the decrease in crop water requirement, while significant decrease of irrigation water requirement should be attributed to combined action of rising precipitation and a slight increase in temperature.

CLIMATE CHANGE IMPACT ON IRRIGATION WATER REQUIREMENT IN BARITO KUALA SOUTH KALIMANTAN INDONESIA

2019 ◽  
Author(s):  
MAYA AMALIA ACHYADI ◽  
KOICHIRO OHGUSHI ◽  
TOSHIHIRO MORITA ◽  
SU WAI THIN ◽  
WATARU KAWAHARA
Keyword(s):  
Climate Change ◽  
Irrigation Water ◽  
Climate Change Impact ◽  
Water Requirement ◽  
Irrigation Water Requirement ◽  
Change Impact

Assessment of climate change impacts on irrigation water requirement and rice yield for Ngamoeyeik Irrigation Project in Myanmar

2014 ◽  
Vol 5 (3) ◽  
pp. 427-442 ◽  
Author(s):  
S. Shrestha ◽  
N. M. M. Thin ◽  
P. Deb
Keyword(s):  
Climate Change ◽  
Irrigation Water ◽  
General Circulation ◽  
Water Requirement ◽  
Maximum Temperature ◽  
Climate Projections ◽  
Irrigation Water Requirement ◽  
Irrigation Project ◽  
Aquacrop Model ◽  
Increasing Trend

This study analyzes the impacts of climate change on irrigation water requirement (IWR) and yield for rainfed rice and irrigated paddy, respectively, at Ngamoeyeik Irrigation Project in Myanmar. Climate projections from two General Circulation Models, namely ECHAM5 and HadCM3 were derived for the 2020s, 2050s, and 2080s. The climate variables were downscaled to basin level by using the Statistical DownScaling Model. The AquaCrop model was used to simulate the yield and IWR under future climate. The analysis shows a decreasing trend in maximum temperature for three scenarios and three time windows considered; however, an increasing trend is observed for minimum temperature for all cases. The analysis on precipitation also suggests that rainfall in wet season is expected to vary largely from −29 to +21.9% relative to the baseline period. A higher variation is observed for the rainfall in dry season ranging from −42% for 2080s, and +96% in the case of 2020s. A decreasing trend of IWR is observed for irrigated paddy under the three scenarios indicating that small irrigation schemes are suitable to meet the requirements. An increasing trend in the yield of rainfed paddy was estimated under climate change demonstrating increased food security in the region.

scholarly journals Global cotton production under climate change – Implications for yield and water consumption

2020 ◽  
Author(s):  
Yvonne Jans ◽  
Werner von Bloh ◽  
Sibyll Schaphoff ◽  
Christoph Müller
Keyword(s):  
Climate Change ◽  
Water Consumption ◽  
Irrigation Water ◽  
Climate Impacts ◽  
Future Climate ◽  
The Other ◽  
Aral Sea ◽  
Future Climate Change ◽  
Cotton Production ◽  
Impacts Of Climate Change

Abstract. Being an extensively produced natural fiber on earth, cotton is of importance for economies. Although the plant is broadly adapted to varying environments, growth and irrigation water demand of cotton may be challenged by future climate change. To study the impacts of climate change on cotton productivity in different regions across the world and the irrigation water requirements related to it, we use the process-based, spatially detailed biosphere and hydrology model LPJmL. We find our modelled cotton yield levels in good agreement with reported values and simulated water consumption of cotton production similar to published estimates. Following the ISIMIP protocol, we employ an ensemble of five General Circulation Models under four Representative Concentration Pathways (RCPs) for the 2011–2099 period to simulate future cotton yields. We find that irrigated cotton production does not suffer from climate change if CO2 effects are considered, whereas rainfed production is more sensitive to varying climate conditions. Considering the overall effect of a changing climate and CO2 fertilization, cotton production on current cropland steadily increases for most of the RCPs. Starting from ~ 65 million tonnes in 2010, cotton production for RCP4.5 and RCP6.0 equates to 83 and 92 million tonnes at the end of the century, respectively. Under RCP8.5, simulated global cotton production raises by more than 50 % by 2099. Taking only climate change into account, projected cotton production considerably shrinks in most scenarios, by up to one-third or 43 million tonnes under RCP8.5. The simulation of future virtual water content (VWC) of cotton grown under elevated CO2 results for all scenarios in less VWC compared to ambient CO2 conditions. Under RCP6.0 and RCP8.5, VWC is notably decreased by more than 2000 m3 t−1 in areas where cotton is produced under purely rainfed conditions. By 2040, the average global VWC for cotton declines in all scenarios from currently 3300 to 3000 m3 t−1 and reduction continues by up to 30 % in 2100 under RCP8.5. While the VWC decreases by the CO2 effect, elevated temperature (and thus water stress) reverse the picture. Except for RCP2.6, the global VWC of cotton increase slightly but steadily under the other RCPs until mid century. RCP8.5 results in an average global VWC of more than 5000 m3 t−1 by end of the simulation period. Given the economic relevance of cotton production, climate change poses an additional stress and deserves special attention. Changes in VWC and water demands for cotton production are of special importance, as cotton production is known for its intense water consumption that led, e.g., to the loss of most of the Aral sea. The implications of climate impacts on cotton production on the one hand, and the impact of cotton production on water resources on the other hand illustrate the need to assess how future climate change may affect cotton production and its resource requirements. The inclusion of cotton in LPJmL allows for various large-scale studies to assess impacts of climate change on hydrological factors and the implications for agricultural production and carbon sequestration.

scholarly journals The Global Trend of the Net Irrigation Water Requirement of Maize from 1960 to 2050

Climate ◽  
2019 ◽  
Vol 7 (10) ◽  
pp. 124 ◽  
Author(s):  
Abdoulaye Oumarou Abdoulaye ◽  
Haishen Lu ◽  
Yonghua Zhu ◽  
Yousef Alhaj Hamoud ◽  
Mohamed Sheteiwy
Keyword(s):  
Climate Change ◽  
North America ◽  
Irrigation Water ◽  
Potential Evapotranspiration ◽  
Water Requirement ◽  
Global Climate Models ◽  
Sub Saharan Africa ◽  
Climate Change Scenarios ◽  
Irrigation Water Requirement ◽  
Sub Saharan

Irrigated production around the world has significantly increased over the last decade. However, climate change is a new threat that could seriously aggravate the irrigation water supplies and request. In this study, the data is derived from the IPCC Fifth Assessment Report (AR5). For the climate change scenarios, five Global Climate Models (GCMs) have been used. By using the CROPWAT approach of Smith, the net irrigation water requirement (IRnet) was calculated. For the estimation of the potential evapotranspiration (Epot), the method in Raziei and Pereira was used. According to representative concentration pathway (RCP) 4.5, these increases vary between 0.74% (North America) and 20.92% (North America) while the RCP 8.5 predict increases of 4.06% (sub-Saharan Africa) to more than 68% (North America). The results also show that the region of Latin America is the region with the large amount of IRnet with coprime value between 1.39 km3/yr (GFDL 4.5) and 1.48 km3/yr (CSIRO 4.5) while sub-Saharan Africa has the smallest IRnet amount between 0.13 km3/yr (GFDL 8.5) and 0.14 km3/yr (ECHAM 8.5). However, the most affected countries by this impact are those in sub-Saharan Africa. This study will probably help decision-makers to make corrections in making their decision.

Sign in / Sign up

Export Citation Format

Share Document