Effects of meteorological droughts on agricultural water resources in southern China

Lu, Houquan; Wu, Yihua; Li, Yijun; Liu, Yongqiang

doi:10.1016/j.jhydrol.2017.03.021

Cited by 35 publications

(11 citation statements)

References 26 publications

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“…Drought was analyzed for nonirrigation and irrigation cases and were divided into four grades based on the results of Lu et al. () and Li and Lu (): (1) WDI ≥ 0: no drought; (2) −20% ≤ WDI < 0: mild drought that may have no obvious effect on crops; (3) −40% ≤ WDI < −20%: moderate drought; and (4) WDI < −40%: severe drought.…”

Section: Methodsmentioning

confidence: 99%

“…In this study, southern China is divided into three regions (South China [SC], South of the Yangtze River [SYR], and Southwast China [SWC]) based on the distributions of climate and agriculture, and included the following provinces: Fujian, Guangdong, Guangxi, Hainan, Zhejiang, Jiangxi, Hunan, Yunnan, Sichuan, Guizhou, and Chongqing (Lu et al. ) (Figure ). This area is characterized by a subtropical monsoon climate with majority of rainfall occurring during the summer monsoon season, roughly from April to September.…”

Section: Study Areamentioning

confidence: 99%

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Agricultural Adaptation to Drought for Different Cropping Systems in Southern China under Climate Change

Jun

2019

J American Water Resour Assoc

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This study investigates agricultural adaptation to drought for different cropping systems in southern China. The study area was divided into three regions: South China (SC), South of the Yangtze River (SYR), and Southwest China (SWC). An index of agricultural adaptation to drought (D) was established. Our findings indicated that the average total crop water demand varied greatly among the regions from 1961 to 2010 in southern China. The maximum value was found in the SC region, followed by the SYR and SWC regions. The effects of droughts on different crops were noticeable. Frequent droughts were recorded in late rice than in early rice in the SC and SYR regions. Droughts in the SWC region mainly affected winter wheat. Moreover, the effects of droughts on crops varied during different growth stages. More frequent and serious droughts occurred during the crop critical flowering stage. Particularly, the frequency of moderate and severe droughts for late rice in the SYR region was 62% during the critical flowering stage. For the SC and SYR regions, the D values of early rice (0.29 and 0.29) were lower than that of late rice (0.31 and 0.33), respectively. For the SWC region, the D values of winter wheat and rice were both low, with averages of 0.16 and 0.29, respectively. Our study provides interesting insights for improving the drought defense abilities for different cropping systems by changing crop planting proportion on a regional scale in China.

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Section: Methodsmentioning

confidence: 99%

Section: Study Areamentioning

confidence: 99%

Agricultural Adaptation to Drought for Different Cropping Systems in Southern China under Climate Change

Jun

2019

J American Water Resour Assoc

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“…The risk of China’s agriculture drought disaster is evaluated using the higher spatial resolution of the county unit, based on the information diffusion theory [ 18 ]. An agricultural drought intensity index, based on rainfall and the demand for water for crops, is proposed [ 19 ]. The quantitative relationship between the hazard-induced factors of extreme meteorological disasters and the affected area in the tail of the distribution is depicted [ 20 ].…”

Section: Related Workmentioning

confidence: 99%

Evaluation of an Agricultural Meteorological Disaster Based on Multiple Criterion Decision Making and Evolutionary Algorithm

2018

IJERPH

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The evaluation of a meteorological disaster can be regarded as a multiple-criteria decision making problem because it involves many indexes. Firstly, a comprehensive indexing system for an agricultural meteorological disaster is proposed, which includes the disaster rate, the inundated rate, and the complete loss rate. Following this, the relative weights of the three criteria are acquired using a novel proposed evolutionary algorithm. The proposed algorithm consists of a differential evolution algorithm and an evolution strategy. Finally, a novel evaluation model, based on the proposed algorithm and the Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS), is presented to estimate the agricultural meteorological disaster of 2008 in China. The geographic information system (GIS) technique is employed to depict the disaster. The experimental results demonstrated that the agricultural meteorological disaster of 2008 was very serious, especially in Hunan and Hubei provinces. Some useful suggestions are provided to relieve agriculture meteorological disasters.

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“…Limited by drought indicators and forecasting methods, early management of drought was mostly based on the historical drought data, including drought data, disaster loss data, and related meteorological, hydrological, and monitoring data. With the deepening of the research on the early warning mechanism of the indicator system, the original decision support system (DDS), which used the "monitoring, evaluation, early-warning" as its management framework, began to appear in the field of meteorology and agriculture [26][27][28][29]. There are still problems such as inability to provide relevant information about water supply and insufficient decision-making options.…”

Section: Introductionmentioning

confidence: 99%

Evaluation on Early Drought Warning System in the Jinghui Channel Irrigation Area

Shang

Zhang

2020

IJERPH

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With the economic growth, continuous global environment deterioration, and increasingly serious water resources shortage, droughts have become more and more serious and produced great impacts on both the regional ecology and sustainable economic development. This paper has established the “green, blue, yellow, orange, and red lights” as the early warning grades for agricultural droughts. By using the two influencing factors, namely precipitation and soil moisture, this paper has established the drought assessment index evaluation model using weighted coupling method. It has carried out the analogue simulation of the early drought warning based on the Jinghui Channel’s 2013 water source situations. The soil moisture in January and February is relatively ideal, and the actual early drought warning is expressed by the “green light”. The soil moisture deficit is comparatively serious in March, but the situation concerning water inflow is ideal with the “green light”. Actually, the early warning signal is basically consistent with the soil moisture drought degree between April and August. The actual early warning is expressed by the “green light” as well, but the soil moisture is not so ideal, however, this is the seeding time of the winter wheat so the lack of soil moisture has no impact on the crops output. In November and December, the winter wheat is at the growth and development stage and does not need much moisture. At this stage, the soil moisture is relatively poor. By integrating the time effects into the early drought warning system, this paper provides administrators of irrigation areas with a scientific decision-making based on the drought control measures.

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Effects of meteorological droughts on agricultural water resources in southern China

Cited by 35 publications

References 26 publications

Agricultural Adaptation to Drought for Different Cropping Systems in Southern China under Climate Change

Agricultural Adaptation to Drought for Different Cropping Systems in Southern China under Climate Change

Evaluation of an Agricultural Meteorological Disaster Based on Multiple Criterion Decision Making and Evolutionary Algorithm

Evaluation on Early Drought Warning System in the Jinghui Channel Irrigation Area

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