大气CO<sub>2</sub>浓度升高对长江中下游地区水稻灌溉需水量的影响

doi:10.3880/j.issn.1006-7647.2023.03.004

首页 > 过刊浏览>2023年第43卷第3期 >22-27. DOI:10.3880/j.issn.1006-7647.2023.03.004

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大气CO₂浓度升高对长江中下游地区水稻灌溉需水量的影响

DOI:

10.3880/j.issn.1006-7647.2023.03.004

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作者单位:

(1.河海大学水文水资源与水利工程科学国家重点实验室,江苏南京210098;2.河海大学水文水资源学院,江苏南京210098 )

作者简介:

孙博凯(1999—),男,硕士研究生,主要从事水文物理规律模拟及水文预报研究。E-mail:hhusunbokai@163.com

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中图分类号:

S161；TV93

基金项目:

国家自然科学基金(51979071)

Effects of increased atmospheric CO2 concentration on water demand for rice irrigation in middle and lower reaches of Yangtze River

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Affiliation:

(1.State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China;2.College of Hydrology and Water Resources, Hohai University, Nanjing 210098, China)

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摘要:

利用1981—2013年长江中下游地区127个气象站的观测资料与历史大气大气CO₂浓度数据,对考虑和不考虑大气大气CO₂浓度变化的水稻需水量进行模拟,分析了大气大气CO₂浓度上升对长江中下游地区水稻需水量的影响。结果表明:不考虑大气大气CO₂浓度时,长江中下游地区水稻需水量多年平均值为400.16 mm,空间分布具有明显差异；考虑大气大气CO₂浓度会使水稻需水量比未考虑大气大气CO₂浓度时平均下降1.6%左右；大气大气CO₂浓度每上升1.μmol/mol,研究区水稻需水量平均下降0.071 mm；各子流域的灌溉需水量因有效降水量不同而具有一定差异,考虑大气大气CO₂浓度变化时,长江中下游地区水稻年需补充灌溉总量减少4.24.km³。

Abstract:

Based on the observation data of 127 meteorological stations and historical atmospheric CO2 concentration data in the middle and lower reaches of the Yangtze River from 1981 to 2013, the water demand of rice was simulated with the change of atmospheric CO2 concentration considered or not. The influence of atmospheric CO2 concentration rise on the water demand of rice in the middle and lower reaches of the Yangtze River was analyzed. The results show that, without considering the atmospheric CO2 concentration, the annual average water demand of rice in the middle and lower reaches of the Yangtze River was 400.16 mm, and the spatial distribution was obviously different. The water demand of rice considering atmospheric CO2 concentration decreased by about 1.6% on average compared with that without considering CO2 concentration. For every 1 μmol/mol increase in CO2 concentration, the average water demand of rice in the study area decreased by 0.071 mm. The water demand for irrigation in each sub-basin varies due to different effective rainfall. Considering the change of atmospheric CO2 concentration, the total irrigation water demand for rice in the middle and lower reaches of the Yangtze River decreased by 4.24 km³.

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孙博凯,王卫光,刘国帅.大气CO₂浓度升高对长江中下游地区水稻灌溉需水量的影响[J].水利水电科技进展,2023,43(3):22-27.(SUN Bokai, WANG Weiguang, LIU Guoshuai. Effects of increased atmospheric CO2 concentration on water demand for rice irrigation in middle and lower reaches of Yangtze River[J]. Advances in Science and Technology of Water Resources,2023,43(3):22-27.(in Chinese))

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收稿日期:2022-06-05
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在线发布日期: 2023-05-17
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