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Jianjun Wu      
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Jianjun Wu published an article in March 2017.
Top co-authors See all
Michael Hayes

155 shared publications

University of Nebraska-Lincoln

Peijun Shi

108 shared publications

Academy of Disaster Reduction and Emergency Management; Ministry of Civil Affairs and Ministry of Education, Beijing Normal University; China

Xiaochen Liu

102 shared publications

Beijing Normal University

Guobin Ma

77 shared publications

Beijing Normal University

Zhenghong Tang

71 shared publications

University of Nebraska-Lincoln

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Publication Record
Distribution of Articles published per year 
(2011 - 2017)
Total number of journals
published in
 
4
 
Publications
Article 1 Read 1 Citation Global vulnerability to agricultural drought and its spatial characteristics JianJun Wu, GuangPo Geng, HongKui Zhou, JingHui Liu, QianFen... Published: 28 March 2017
Science China Earth Sciences, doi: 10.1007/s11430-016-9018-2
DOI See at publisher website
Article 1 Read 13 Citations The alleviating trend of drought in the Huang-Huai-Hai Plain of China based on the daily SPEI Qianfeng Wang, Peijun Shi, Tianjie Lei, Guangpo Geng, Jinghu... Published: 08 January 2015
International Journal of Climatology, doi: 10.1002/joc.4244
DOI See at publisher website
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Drought is a major natural hazard that can have devastating impacts on regional agriculture, water resources and the environment. To assess the variability and pattern of drought characteristics in the Huang‐Huai‐Hai (HHH) Plain, the daily Standardized Precipitation Evapotranspiration Index (SPEI) is developed based on daily meteorological data in this study. The daily SPEI data are used, including Annual Total Drought Severity (ATDS), Annual Total Drought Duration (ATDD) and Annual Drought Frequency (ADF), which were calculated from 1981 to 2010 at 28 meteorological stations. We used the indices (ATDS, ATDD and ADF), Hovmöller diagrams and the reliable no parameter statistical methods of the Mann–Kendall test to assess the variability and pattern of drought characteristics for the period from 1981 to 2010 in the HHH plain. The results suggested that severe drought occurred in the 1980s, the late 1990s and the early 2000s, severe drought events occurred in 1981, 1986, 1997 and 2002. Decreasing trends for both ATDS and ATDD were found, and the drought situation did not worsen under global warming during the past 30 years, and the drought situation is alleviating in the entire HHH plain. The northeast and southwest regions of the HHH plain have suffered from more severe drought, and the north region is prone to drought. The results of the study can provide a scientific understanding for the adoption of countermeasures of regional defence against drought and also may serve as a reference point for drought hazard vulnerability analysis.
Article 1 Read 4 Citations Impact of meteorological drought on streamflow drought in Jinghe River Basin of China Lin Zhao, Aifeng Lyu, Jianjun Wu, Michael Hayes, Zhenghong T... Published: 25 November 2014
Chinese Geographical Science, doi: 10.1007/s11769-014-0726-x
DOI See at publisher website
ABS Show/hide abstract
Under global climate change, drought has become one of the most serious natural hazards, affecting the ecological environment and human life. Drought can be categorized as meteorological, agricultural, hydrological or socio-economic drought. Among the different categories of drought, hydrological drought, especially streamflow drought, has been given more attention by local governments, researchers and the public in recent years. Identifying the occurrence of streamflow drought and issuing early warning can provide timely information for effective water resources management. In this study, streamflow drought is detected by using the Standardized Runoff Index, whereas meteorological drought is detected by the Standardized Precipitation Index. Comparative analyses of frequency, magnitude, onset and duration are conducted to identify the impact of meteorological drought on streamflow drought. This study focuses on the Jinghe River Basin in Northwest China, mainly providing the following findings. 1) Eleven meteorological droughts and six streamflow droughts were indicated during 1970 and 1990 after pooling using Inter-event time and volume Criterion method. 2) Streamflow drought in the Jinghe River Basin lagged meteorological drought for about 127 days. 3) The frequency of streamflow drought in Jinghe River Basin was less than meteorological drought. However, the average duration of streamflow drought is longer. 4) The magnitude of streamflow drought is greater than meteorological drought. These results not only play an important theoretical role in understanding relationships between different drought categories, but also have practical implications for streamflow drought mitigation and regional water resources management.
Article 1 Read 14 Citations Quantitative assessment and spatial characteristic analysis of agricultural drought risk in China Bin He, Jianjun Wu, Aifeng Lű, Xuefeng Cui, Lei Zhou, Ming L... Published: 05 December 2012
Natural Hazards, doi: 10.1007/s11069-012-0398-8
DOI See at publisher website
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Based on the natural disaster analysis theory, the spatial characteristics of agricultural drought risk in China were investigated at 10 × 10 km grid scale. It shows that agricultural drought risk in China has a clear southeast–northwest spatial pattern. High and very high risk mainly occur in the eastern part of Northeast Plain, the central of Inner Mongolian Plateau, the Loess Plateau, north Xinjiang, the north and south of Yangtze Plain, and Yunnan-Guizhou Plateau. Statistics also show that 19.5 % of the main crop planting area is exposed to low risk, 35.1 % of the area to moderate risk, 39.8 % of the area to high risk, and 5.6 % of the area to very high risk. Further investigation shows that 23 % of total wheat growing areas is located in high and very high risk class; corn and rice are 16 % and 14 % respectively. Comprehensive analysis shows that severely affected areas by drought in the history are mainly located in the high and very high risk areas.
Article 1 Read 2 Citations Retrieval and analysis of coal fire temperature in Wuda coalfield, Inner Mongolia, China Weiguo Jiang, Xiaohua Zhu, Jianjun Wu, Lei Gu, Guobin Ma, Xi... Published: 22 March 2011
Chinese Geographical Science, doi: 10.1007/s11769-011-0455-3
DOI See at publisher website
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Coal fire burning around the world is an environmental catastrophe characterized by the emission of noxious gases, particulate matter, and condensation by-products. In this study, coal fire temperature is retrieved based on Landsat 5 TM images and Generalized Single-Channel Algorithm (GSCA), in Wuda coalfield, Inner Mongolia, China. Then coal fire zones are extracted by Jenks’ natural breaks and threshold methods based on temperature images. Changes of coal fire zones are analyzed from 1989 to 2008. The results are summarized as follows: 1) The coal fire temperature retrieval method based on Landsat 5 TM and the GSCA model is effective and feasible, because the temperature error is relatively small (from −2.9°C to +2.6°C) between the measured temperature and the retrieved temperature. 2) The accuracy is relatively high to extract coal fire zones through the Jenks’ natural breaks and threshold methods, because 83.56% of surveyed area is located in the coal fire zones extracted in 2005. 3) The coal fire area increased 9.81 × 105 m2 from 1989 to 2005, and the annual growth is about 6.1 × 104 m2, with an annual increasing rate of 2.48%. The area of coal fire decreased by 8.1 × 105 m2 from 2005 to 2008.