Jianhua Wang

Yantai Institute of Coastal Zone Research

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Yong Zhao

China Institute of Water Resources and Hydropower Research

Hao Wang

China Institute of Water Resources and Hydropower Research

Ya Huang

Hohai University

Weihua Xiao

China Institute of Water Resources and Hydropower Research

Qingming Wang

China Institute of Water Resources and Hydropower Research

Yaohuan Huang

Chinese Academy of Sciences

Yuyan Zhou

China Institute of Water Resources and Hydropower Research

Xiaoyan Li

Beijing Normal University

Yongnan Zhu

Capital Medical University

Haihong Li

China Institute of Water Resources and Hydropower Research

Cooperative Institutions

China Institute of Water Resources and Hydropower Research

Chinese Academy of Sciences

University of Chinese Academy of Sciences

Ministry of Water Resources of the People's Republic of China

Tsinghua University

Hohai University

Wuhan University

Institute of Geographic Sciences and Natural Resources Research

Beijing Normal University

State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering

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[Impact of groundwater resource temporal-spatial change in Minqin oasis on ecological security of irrigation region landscape].

PubMed (2004)

Dongmei Song Duning Xiao Mingguo Ma Jianhua Wang

By the GIS technology, this paper studied the impact of groundwater resource temporal-spatial change in the lake area of Minqin Oasis on the ecological security of irrigation region landscape. The results showed that the depth of groundwater was descending continuously, the velocity of groundwater line change in the center of irrigation region was faster than that in the edge region, and consequently, the area of the descending funnel of groundwater line was enlarged. From 1987 to 2001, the area with a groundwater depth deeper than 3 m was increased from 81.2% to 97.4%. The descending of groundwater line due to soil water reducing was the main reason that resulted in the destruction and deadness of forests. When the depth of groundwater was deeper than 8 m and soil water content was less than 12%, the die-back rate of tree was morn than 90%, and that of shrub was more than 50%. Impacted by the descend of groundwater depth, the area of forest land, shrub land and open-canopy land was decreased by 67%, 54% and 31%, and the number of their patches was decreased by 35, 42 and 50, respectively. The mineralization degree of groundwater in northern irrigation region increased obviously, and changed the safe pattern of crop growth. The benefit of agriculture decreased, and the adjustment of planting construction was restricted seriously, which became the main impact factor on the ecological security of irrigation region. Reasonably distributing water resource between upper and lower river basin, reducing unreasonable land use, decreasing farmland area, and constructing safety landscape pattern could lead to the balance between the exploitation and replenishment of groundwater resource, prevent the descend of groundwater depth and the increase of groundwater mineralization, and improve the ecological security of the irrigation region.

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Citations (2)

Attribution analysis based on Budyko hypothesis for land evapotranspiration change in the Loess Plateau, China

Journal of Arid Land (2019)

Guohua He Yong Zhao Jianhua Wang Xuerui Gao Fan He

10.1007/s40333-019-0107-5

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Citations (24)

A pitfall in crosswell seismic exploration (and a way out)

The Leading Edge (2006)

Jianhua Wang LI Qing-zhong

Crosswell seismic techniques can produce high-frequency and high-resolution images of the geologic structure between wells, but these techniques are still not consistently successful.

Seismic exploration

10.1190/1.2193212

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Evaluating Spatiotemporal Variation of Groundwater Depth/Level in Beijing Plain, a Groundwater-Fed Area from 2001 to 2010

Advances in Meteorology (2016)

Yuyan Zhou Weihua Xiao Jianhua Wang Yong Zhao Ya Huang

Groundwater has always been a valuable resource in Beijing, facing a great decline of groundwater level during the past decades. However, few previous researches have revealed the spatial variation of groundwater level within Beijing Plain. In this study, spatiotemporal variation of groundwater level from 2001 to 2010 in Beijing Plain has been investigated. Factor analysis has been conducted to identify the primary influencing factor. Results showed that the groundwater level decreased by 8.41 m from 2001 to 2010, with a linear decreasing rate of 0.954 m per year averagely. Significant spatial variation characteristics have been detected. The north area suffered more groundwater depletion than the south part in general. The lowest groundwater level has been identified downstream Miyun Reservoir, central part of the Plain. Nevertheless, the most of the south part witnessed a slight revival between 2001 and 2010. This may be due to the differences of socioeconomic circumstances in the Plain. Three influencing factors, that is, “demand factor,” “supply factor,” and “loss factor,” have been identified in the water balance model. Eigenvalues of these factors are 3.563, 2.910, and 1.632, respectively, indicating that these factors influenced the groundwater system to various extents, with the demand factor being the primary one.

10.1155/2016/8714209

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Citations (21)

The Review of GRACE Data Applications in Terrestrial Hydrology Monitoring

Advances in Meteorology (2014)

Dong Jiang Jianhua Wang Yaohuan Huang Kang Zhou Xiangyi Ding

The Gravity Recovery and Climate Experiment (GRACE) satellite provides a new method for terrestrial hydrology research, which can be used for improving the monitoring result of the spatial and temporal changes of water cycle at large scale quickly. The paper presents a review of recent applications of GRACE data in terrestrial hydrology monitoring. Firstly, the scientific GRACE dataset is briefly introduced. Recently main applications of GRACE data in terrestrial hydrological monitoring at large scale, including terrestrial water storage change evaluation, hydrological components of groundwater and evapotranspiration (ET) retrieving, droughts analysis, and glacier response of global change, are described. Both advantages and limitations of GRACE data applications are then discussed. Recommendations for further research of the terrestrial water monitoring based on GRACE data are also proposed.

Water cycle

10.1155/2014/725131

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Citations (61)

Analysis of river runoff in the Poyang Lake Basin of China: long-term changes and influencing factors

Hydrological Sciences Journal (2016)

Weiwei Shao Xiangdong Chen Zuhao Zhou Jiahong Liu Ziqi Yan

An analysis of the variation characteristics and evolutionary trends in the runoff of five rivers in the Poyang Lake Basin was conducted using the MK trend test, Morlet wavelet transforms, correlation analyses, and other methods. For 1956–2011, the inflow runoff displays small, statistically insignificant trends. However, for 2000–2011, significant downward trends are present. River runoff in the basin is significantly correlated with precipitation, while water intake and use is less influential; the most significant impact on river runoff is climate variability. To analyse the effects of water conservancy project scheduling and operation, we also compare the inflow and outflow runoff processes of typical large reservoirs before and after peak reservoir construction. The scheduling and operation of large reservoirs in the five rivers is known to play a supplementary role in dry season inflow runoff. The recent reduction in inflow runoff was mainly caused by basin precipitation; reasonable scheduling of water conservancy projects in the five rivers plays a positive role in safeguarding the water required by the dry season ecosystem in Poyang Lake.

Inflow

Outflow

Dry season

Morlet wavelet

10.1080/02626667.2016.1255745

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Citations (23)

Beijing's Water Resources: Challenges and Solutions

JAWRA Journal of the American Water Resources Association (2015)

Jianhua Wang Yizi Shang Hao Wang Yong Zhao Yin Yin

Abstract Beijing's local water resources have been overexploited and the ecological and environmental pressures exceed the carrying capacity of this densely populated megacity. This article examines the current status of Beijing's water resources with respect to its industrial, residential, and eco‐environmental water usage and the challenges it may face in the near future. The article describes the context of water uses, the steps taken by Beijing to alleviate the water shortage problems, and challenges to Beijing's abilities to meet its urgent and future water needs. A multipronged strategy is proposed that aims at both the present problems and the anticipated future challenges. In particular, engineering and institutional approaches for Beijing's successful transition from overexploitation to sustainable utilization of water resources are explained. Actions include reasonable water utilization, water conservation, reclaimed wastewater, and importing water from neighboring areas. We conclude that Beijing must take additional steps in water resource management to ensure its sustainable development that involves continued urbanization sprawls and population growth. Future water resource management strategies should focus on strengthening water demand management through water conservation, efficient interbasin water transfers, use of nontraditional water resources, strategically reserving water supply, and promoting rehabilitation of the eco‐environments.

Megacity

Water use

10.1111/1752-1688.12315

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Citations (46)

An Improved Classification Model Based on Feature Fusion for Orchid Species

Journal of Electrical Engineering and Technology (2023)

Jianhua Wang Haozhan Wang Yongbing Long Yubin Lan

Feature (linguistics)

10.1007/s42835-023-01705-7

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Citations (1)

A New Family of Galeaspids (Jawless Stem‐Gnathostomata) from the Early Silurian of Chongqing, Southwestern China

Acta Geologica Sinica - English Edition (2022)

Yang Chen Zhikun Gai Qiang Li Jianhua Wang Lijian Peng

Abstract A new genus and species of agnathan Eugaleaspidiformes (Galeaspida), Yongdongaspis littoralis gen. et sp. nov., is described from the Llandovery (lower Silurian) Huixingshao Formation at Yongdong Town, Xiushan County, Chongqing, southwestern China. This new Telychian taxon morphologically exhibits some transitional states between Sinogaleaspidae and a cluster of higher eugaleaspidiforms containing Tridensaspidae, Eugaleaspidae, Yunnanogaleaspis , and Nochelaspis , which we term here as the ‘eugaleaspid cluster'. Phylogenetic analysis of an extended character matrix of Galeaspida reveals Yongdongaspis , on which Yongdongaspidae fam. nov. is erected, as the sister taxon of this ‘eugaleaspid cluster', supported by two synapomorphies, the presence of one median transverse canal, and two lateral transverse canals leaving from the infraorbital canal. As the first fish described from the Llandovery Huixingshao Formation in Chongqing, Yongdongaspis provides new fossil evidence for the subdivision and correlation of the Upper Red Beds in South China.

Synapomorphy

Sister group

10.1111/1755-6724.14909

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Citations (8)

Removal of Fe²⁺ in coastal aquaculture source water by manganese ores: Batch experiments and breakthrough curve modeling

Water Environment Research (2024)

Jianhua Wang Wenchao Feng Jian Lü Jun Wu Wenxin Cao

Abstract Excessive Fe 2+ in coastal aquaculture source water will seriously affect the aquaculture development. This study used manganese sand to investigate the removal potential and mechanism of Fe 2+ in coastal aquaculture source water by column experiments. The pseudo‐first‐order kinetic model could better describe Fe 2+ removal process with R 2 in the range of 0.9451–0.9911. More than 99.7% of Fe 2+ could be removed within 120 min while the removal rate ( k ) was positively affected by low initial concentration of Fe 2+ , high temperature, and low pH. Logistic growth (S‐shaped growth) model could better fit the concentration variation of Fe 2+ in the effluent of the column (R 2 >0.99). The Fe 2 breakthrough curve could be fitted by Bohart‐Adams, Yoon‐Nelson, and Thomas models (R 2 >0.95). Smooth slices with irregular shapes existed on the surface of manganese sand after the reaction while Fe content increased significantly on the surface of manganese sand after the column experiment. Moreover, FeO (OH) was mainly formed on the surface of manganese sand after the reaction. Practitioner Points Fe 2+ in coastal aquaculture source water could be removed by manganese ores. The pseudo‐first‐order kinetic model better described the Fe 2+ removal process. FeO (OH) was mainly formed on the surface of manganese sand after the reaction.

10.1002/wer.11147

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