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Cite this article:王 柳.我国农田水利工程建设抵御水旱灾害效果评估[J].灌溉排水学报,0,():-.
WANG Liu.我国农田水利工程建设抵御水旱灾害效果评估[J].灌溉排水学报,0,():-.
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DOI:
Effect Evaluation of Farmland Irrigation and Drainage Engineering on Reducing Flood and Drought Disasters since 2011 in China
WANG Liu
Academy of Agricultural Planning and Engineering,Ministry of Agriculture and Rural Affairs
Abstract:
【Background】The farmland irrigation and drainage engineering is an important part of the construction of high-facilitated farmland, and its construction standard is one of the important indicators of high-facilitated farmland. After suggestion of promoting farmland irrigation and drainage engineering construction was put forward by No.1 document of the Chinese Communist Party central committee in 2011, with the development of high-facilitated farmland construction, farmland irrigation and drainage engineering developed faster than that before 2011, with an investment of more than 80 billion Yuan. 【Objective】In order to evaluate the effect of farmland irrigation and drainage engineering on reducing flood and drought disasters and stabilizing yield since 2011, the precipitation, the standard ratios of flood and drought affected areas to seeded areas of each province were divided into two groups which are 1994-2010, 2011-2018. 【Method】The linear model was used for fitting the changes of flood and drought disaster rate with precipitation in the two periods. Then one-way ANOVA analysis of the two groups of precipitation data were carried out to ensure that there was no significant difference in precipitation between the two groups. Then, the difference of the standard ratios of flood and drought affected areas to seeded areas, the standard ratios of flood and drought suffered areas to seeded areas, and ratios of flood and draught affected areas with yield loss rate of 10% - 30% to seeded areas between two groups were investigated.【Result】The results showed that that the standard ratios of flood affected areas to seeded areas increased significantly with the increase of precipitation from 1994 to 2010, indicating that the flood disaster rate was greatly affected by precipitation in this period, while the flood disaster rate had no significant relationship with precipitation from 2011 to 2018; the standard ratios of drought affected areas to seeded areas decreased significantly with the increase of precipitation from 1994 to 2010 and 2011 to 2018, and the slope of regression line from 2011 to 2018 was less than that from 1994 to 2010, indicating that the influence of rainfall on the drought disaster was reduced. Except for Zhejiang, Anhui, Sichuan and Ningxia, there was no significant difference in precipitation between two groups in other provinces. During the period of 2011-2018, the ratios of drought affected areas to seeded areas, drought suffered areas to seeded areas and drought affected areas with yield loss rate of 10%~30% to seeded areas decreased 5.14-22.52, 2.21-16.79 and 3.03-10.41 percentage point compared with that during the period of 1994-2010, while the ratios of flood affected areas to seeded areas, flood suffered areas to seeded areas and flood affected areas with yield loss rate of 10%~30% to seeded areas decreased 3.21-9.15, 1.75 - 4.54 and 1.46-3.31 percentage point respectively. The farmland irrigation and drainage engineering had obvious drought resistance effect for province in arid region, semi-arid region, semi-humid region, such as Beijing, Tianjin, Hebei, Shanxi, Inner Mongolia, Jilin, Tibet, Shaanxi, Gansu, Qinghai, Xinjiang, Liaoning and Heilongjiang; some province in humid region, the flood resistance effect is obvious, such as Fujian, Jiangxi, Hubei, Hunan, Guizhou and Yunnan; in some province in semi-humid region, such as Shandong and Henan, and some province in humid region, such as Jiangsu, Guangdong, Guangxi, and Chongqing, had both drought and flood resistance effects.【Conclusion】The results show that the drought resistance effect of farmland irrigation and drainage engineering is higher than that of flood resistance; the absolute value of drought disaster resistance is greater than flood disaster resistance, and the stable yield effect of farmland irrigation and drainage engineering in arid area is better than that in rainfall rich area. This study can provide reference for future farmland irrigation and drainage engineering layout.
Key words:  irrigation and drainage;well- facilitated farmland; flood disasters; drought disaster; disaster resistance capability; evaluation