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More and more attention has been paid to farmland water conservancy project (FWCP) maintenance in China, which can reallocate water resources in a more rational and efficient manner. Compared with the traditional survey such as field survey, FWCP maintenance can be improved efficiently with geospatial technology. To improve the level of FWCP maintenance in China, a collaborative sensing system framework by integrating satellite, aerial, and ground remote sensing is put forward. The structure of the system framework includes three sections, namely the data acquisition, the operational work, and the application and service. Through the construction and operation of such collaborative sensing system, it will break through the limitation of any single remote sensing platform and provide all-around and real-time information on FWCP. The collaborative monitoring schemes for the designed FWCP maintenance can engage ditch riders to maintain more effectively, which will enable them to communicate more specifically with smallholders in the process of irrigation. Only when ditch riders and farmers are fully involved, irrigation efficiency will be improved. Furthermore, the collaborative sensing system needs feasible standards for multi-source remote sensing data processing and intelligent information extraction such as data fusion, data assimilation, and data mining. In a way, this will promote the application of remote sensing in the field of agricultural irrigation and water saving. On the whole, it will be helpful to improve the traditional maintenance problems and is also the guarantee for establishing a long-term scientific management mechanism of FWCP maintenance in developing countries, especially in China.
Zhenhua Chao; Xuan Fang; Jiaming Na; Mingliang Che. A Collaborative Sensing System for Farmland Water Conservancy Project Maintenance through Integrating Satellite, Aerial, and Ground Observations. Water 2021, 13, 2163 .
AMA StyleZhenhua Chao, Xuan Fang, Jiaming Na, Mingliang Che. A Collaborative Sensing System for Farmland Water Conservancy Project Maintenance through Integrating Satellite, Aerial, and Ground Observations. Water. 2021; 13 (16):2163.
Chicago/Turabian StyleZhenhua Chao; Xuan Fang; Jiaming Na; Mingliang Che. 2021. "A Collaborative Sensing System for Farmland Water Conservancy Project Maintenance through Integrating Satellite, Aerial, and Ground Observations." Water 13, no. 16: 2163.
The influence of different urbanization levels on land surface temperature (LST) has attracted extensive attention. Though both are world megacities, Shanghai and Tokyo have gone through different urbanization processes that urban sprawl characterized by impervious surfaces was more notable in Shanghai than in Tokyo over the past years. Here, annual and seasonal mean LST in daytime (LSTday), in nighttime (LSTnight), and LSTdiff (annual and seasonal mean difference of LST in daytime and nighttime) were extracted from the MODIS LST product, MYD11A2 006, for 9 typical sites in Shanghai and Tokyo from 2003 to 2018, respectively. Then the effects of the urbanization levels were analyzed through MannKendall statistics and Sen’s slope estimator. The trends of change in LSTday and LSTdiff for most sites in Shanghai, an urbanizing region, rose. In addition, there was no obvious regularity when considering seasonal factors, which could be due to the increasing fragmentized landscapes and scattered water bodies produced by urbanization. By comparison, the change in LST in Tokyo, a posturbanizing region, was regular, especially in the spring. In other seasons, there was no obvious trend in temperature change regardless of whether the land cover was impervious surface or mountain forest. On the whole, vegetation cover and water bodies can mitigate the urban heat island (UHI) effect in urban regions. For more scientific urban planning, further analysis about the effect of urbanization on LST should focus on the compound stress from climate change and urbanization.
Zhenhua Chao; Albert I. J. M. Van Dijk; Liangxu Wang; Mingliang Che; Shengfang Hou. Effects of Different Urbanization Levels on Land Surface Temperature Change: Taking Tokyo and Shanghai for Example. Remote Sensing 2020, 12, 2022 .
AMA StyleZhenhua Chao, Albert I. J. M. Van Dijk, Liangxu Wang, Mingliang Che, Shengfang Hou. Effects of Different Urbanization Levels on Land Surface Temperature Change: Taking Tokyo and Shanghai for Example. Remote Sensing. 2020; 12 (12):2022.
Chicago/Turabian StyleZhenhua Chao; Albert I. J. M. Van Dijk; Liangxu Wang; Mingliang Che; Shengfang Hou. 2020. "Effects of Different Urbanization Levels on Land Surface Temperature Change: Taking Tokyo and Shanghai for Example." Remote Sensing 12, no. 12: 2022.
Carbon dynamics, a key index to evaluate ecosystems, are very complex in the Hindu Kush Himalayan (HKH) region due to the topography, diverse regional climate, and different land cover types. MODIS GPP was used to evaluate carbon sequestration in the HKH region from 2001 to 2016. In general, the spatio-temporal variation of the average daily gross primary productivity (GPP) was very heterogeneous due to the changing terrain, diverse regional climate, and different land cover types in the region. Many factors should be considered for GPP measurements, including satellite, airplane, ground-based and modelling data. We concluded that it is necessary to determine the driving forces of GPP in the future in order to establish scientific policies and development programs for the HKH region.
Zhenhua Chao; Mingliang Che; Zhanhuan Shang; A. Allan Degen. Tracking of Vegetation Carbon Dynamics from 2001 to 2016 by MODIS GPP in HKH Region. Carbon Management for Promoting Local Livelihood in the Hindu Kush Himalayan (HKH) Region 2019, 45 -62.
AMA StyleZhenhua Chao, Mingliang Che, Zhanhuan Shang, A. Allan Degen. Tracking of Vegetation Carbon Dynamics from 2001 to 2016 by MODIS GPP in HKH Region. Carbon Management for Promoting Local Livelihood in the Hindu Kush Himalayan (HKH) Region. 2019; ():45-62.
Chicago/Turabian StyleZhenhua Chao; Mingliang Che; Zhanhuan Shang; A. Allan Degen. 2019. "Tracking of Vegetation Carbon Dynamics from 2001 to 2016 by MODIS GPP in HKH Region." Carbon Management for Promoting Local Livelihood in the Hindu Kush Himalayan (HKH) Region , no. : 45-62.
With rapid social and economic development, pressure on the land ecosystem in Shandong Province, China, is becoming more and more obvious. This study aimed to gain insight into the impacts of urbanization on several ecosystem and land characteristics. Carnegie-Ames-Stanford Approach was used to estimate the terrestrial vegetation net primary productivity (NPP) from 2001 to 2010 in Shandong. The spatio-temporal pattern of NPP was analyzed. Subsequently, the pressure index of cultivated land in Shandong was calculated and used to analyze the spatiotemporal characteristics and the problem of supply and demand for cultivated land by using geographical information system technology. The relationship between NPP and the pressure index of cultivated land was further analyzed, and the influence of both natural and manmade factors was discussed. Based on the above, some suggestions have been proposed for the sustainable development of land use/cover change in Shandong Province. A weak increasing trend in the overall NPP has been observed over the study period, and the NPP in the southwest was higher than in other regions. Impacts of the land use types on NPP were different. About 34.6 × 1012 g of carbon was absorbed every year, of which nearly 75% was absorbed by farmland. Cultivated land initially decreased and then increased during the period. With the help of technology, science, macroeconomic policy, and other developments, the total grain yield increased with some fluctuation. Moreover, the actual area of cultivated land has increased. These changes improved the theoretical minimum cultivated land area per capita, while the pressure index decreased. The pressure on cultivated land also showed obvious regional differences during this period, which is mainly concentrated in the coastal regions and the cities of Jinan and Laiwu. In the western and northern regions, on the other hand, the pressure was relatively lower due to slower economic growth. These results reflect that the urbanization has huge impact on the cultivated land resources.
Zhenhua Chao; Peidong Zhang; Xufeng Wang. Impacts of Urbanization on the Net Primary Productivity and Cultivated Land Change in Shandong Province, China. Journal of the Indian Society of Remote Sensing 2018, 46, 809 -819.
AMA StyleZhenhua Chao, Peidong Zhang, Xufeng Wang. Impacts of Urbanization on the Net Primary Productivity and Cultivated Land Change in Shandong Province, China. Journal of the Indian Society of Remote Sensing. 2018; 46 (5):809-819.
Chicago/Turabian StyleZhenhua Chao; Peidong Zhang; Xufeng Wang. 2018. "Impacts of Urbanization on the Net Primary Productivity and Cultivated Land Change in Shandong Province, China." Journal of the Indian Society of Remote Sensing 46, no. 5: 809-819.