A spatial reasoning approach to estimating paddy rice water demand in Hwanghaenam-do, North Korea

2007 ◽  
Vol 89 (3) ◽  
pp. 185-198 ◽  
Author(s):  
Min-Won Jang ◽  
Jin-Yong Choi ◽  
Jeong-Jae Lee
2007 ◽  
Author(s):  
Sung Han - Yoon ◽  
Jin Yong Choi ◽  
Min Won Jang ◽  
Seung Hwan Yoo

2019 ◽  
Vol 248 ◽  
pp. 109256 ◽  
Author(s):  
Chul-Hee Lim ◽  
Cholho Song ◽  
Yuyoung Choi ◽  
Seong Woo Jeon ◽  
Woo-Kyun Lee

2020 ◽  
Author(s):  
Sujong Lee ◽  
Halim Lee ◽  
Hyun-Woo Jo ◽  
Youngjin Ko ◽  
Chul-Hee Lim ◽  
...  

<p>In 2019, The Food and Agriculture Organization(FAO) announced that North Korea was a food shortage country and which is closely related to the agricultural drought frequency. These agricultural drought frequencies derived from global climate change are increasing and in terms of climate change, agricultural drought is not just a national problem, but a global scale issue. To respond to agricultural drought-related with food shortage, various studies and projects are conducted based on the remote sensing data and modeling such as hydrological model, crop model, but access to public data in North Korea is limited, and also objectivity is difficult to be guaranteed. In this study, the estimation of rice yield and irrigation water demand based on the RCP (Representative Concentration Pathway) climate change scenario was conducted using Environmental Policy Integrated Climate(EPIC) model which calculates various variables related to agriculture by using climatic data, Soil data and topographic data. For validating the parameter of the model, the study area was set to the Korean Peninsula and the parameter was set stepwise compared results of the model with South Korea national statistics. The results of rice yield and irrigation water demand in the Korean Peninsula was validated by using statistics of international organizations. The assessment of Rice Yield and Irrigation Water Demand Change based on the EPIC model is considered a method for complementing the field test and statistical limitations in North Korea. This study can be used as basic data for agricultural drought in North Korea and Based on the model results, it is necessary to concern food security.</p>


2020 ◽  
Author(s):  
Todd S. Rosenstock ◽  
Megan Mayzelle ◽  
Nictor Namoi ◽  
Peter Fantke

Abstract This paper presents the results of a comparative assessment of Andhra Pradesh Community Natural Farming (APCNF) and conventional management systems across six cropping systems in Andhra Pradesh, India. The six crops investigated, i.e. paddy rice, groundnut, maize, chillies, cotton and Bengal gram, account for more than 80% of crop area in the state. Greenhouse gas emissions (carbon footprint) were assessed using methods consistent with Life Cycle Analysis. Given the potential for APCNF to affect multiple ecological, economic and social aspects of farming, the study also briefly comments on preliminary results for yields, costs, gender-differentiated labor, ecosystem impact, and human toxicity by synthesizing the available literature and reporting preliminary results from data collection. The results suggest that APCNF emissions are likely to be significantly lower than those of conventional systems. APCNF would reduce emissions by a minimum of 23% in comparison to conventional practices at the field level. A transition to APCNF could save on average of 5.1 million tonnes CO2eq year-1, which is approximately equal to mitigating 30% of emissions from this cropland. Massive potential for emission reductions remain untapped in terms of residue management, paddy rice water management, livestock, and agroforestry. Trends in preliminary data on other social and environmental outcomes support previous studies, and would seem to indicate that APCNF may generate substantial benefits for the people and landscapes of Andhra Pradesh.


2017 ◽  
Vol 97 (6) ◽  
pp. 1702-1705 ◽  
Author(s):  
Catherine E. L. Ong ◽  
Gumphol Wongsuvan ◽  
Janet S. W. Chew ◽  
Tan Yian Kim ◽  
Low Hwee Teng ◽  
...  

2020 ◽  
Vol 12 (3) ◽  
pp. 1180
Author(s):  
Scott Jansing ◽  
Mahichi ◽  
Dasanayake

Irrigated paddy rice agriculture accounts for a major share of Asia Pacific’s total water withdrawal. Furthermore, climate change induced water scarcity in the Asia-Pacific region is projected to intensify in the near future. Therefore, methods to reduce water consumption through efficiency measures are needed to ensure the long-term (water) sustainability. The irrigation systems, subak of Karangasem, Indonesia, and the tameike of Kunisaki, Japan, are two examples of sustainable paddy rice irrigation. This research, through interviews and an extensive survey, comparatively assessed the socio-environmental sustainability of the two irrigation management systems with special reference to the intensity and nature of social capital, equity of water distribution, water demand, water footprint, and water quality, etc. The prevailing social capital paradigm of each system was also compared to its overall managerial outcomes to analyze how cooperative action contributes to sustainable irrigation management. Both systems show a comparable degree of sustainable irrigation management, ensuring an equitable use of water, and maintain relatively fair water quality due to the land-use practices adapted. However, the systems differ in water demand and water efficiency principally because of the differences in the irrigation management strategies: human and structural. These findings could help devise mechanisms for transitioning to sustainable irrigation management in the commercially-oriented paddy rice agricultural systems across the Asia-Pacific region.


2020 ◽  
Vol 229 ◽  
pp. 105939 ◽  
Author(s):  
Xuechun Li ◽  
Dan Chen ◽  
Xinchun Cao ◽  
Zhaohui Luo ◽  
Michael Webber

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