Results 241 to 250 of about 1,710,251 (286)

Application of the dual-isotope approach and Bayesian isotope mixing model to identify nitrate in groundwater of a multiple land-use area in Chengdu Plain, China.

Science of the Total Environment, 2020
Nitrate (NO3-) contamination in groundwater is an environmental problem worldwide. Partitioning the pollution into its sources is the key for effective controls.
Han Zhang, Yi Xu, Siqian Cheng, Qiling Li, Hao-Ran Yu   +4 more
semanticscholar   +1 more source

Capacity Analysis of a Land Mobile Satellite System Using Dual-Polarized Antennas for Diversity

2015 IEEE 82nd Vehicular Technology Conference (VTC2015-Fall), 2015
In this paper, the ergodic capacity (EC) of a land mobile satellite (LMS) system using dual-polarized antennas for transmit diversity is analysed. Three key channel parameters, i.e. cross-polarization discrimination (XPD), transmit and receive correlation coefficients and Ricean K-factor are included in channel modeling and their effects on the EC are ...
Ting Qi, Youzheng Wang
openaire   +2 more sources

Aerosol retrieval over land using the (A)ATSR dual-view algorithm

2009
Aerosols play an important role in climate and air quality. They have a direct effect on climate by scattering and/or absorbing the incoming solar radiation [Haywood and Boucher, 2000]. Reflection of solar radiation increases the atmospheric albedo, causing a negative radiative effect and therefore cooling of the atmosphere.
Lyana Curier, Gerrit de Leeuw, Pekka Kolmonen, Anu-Maija Sundström, Larisa Sogacheva, Yasmine Bennouna   +5 more
openaire   +1 more source

Dual stresses of flooding and agricultural land use reduce earthworm populations more than the individual stressors.

Science of the Total Environment, 2020
Global climate change is leading to a significant increase in flooding events in many countries. Current practices to prevent damage to downstream urban areas include allowing the flooding of upstream agricultural land. Earthworms are ecosystem engineers,
T. B. Kiss, Xiaohui Chen, J. Ponting, T. Sizmur, M. Hodson   +4 more
semanticscholar   +1 more source

Dual-polarimetric C-band SAR data for land use/land cover classification by incorporating textural information

Environmental Earth Sciences, 2016
The work presented here showed a comprehensive evaluation of dual-polarimetric RISAT-1 data for land use/land cover (LULC) classification. The textural images were extracted with the help of gray-level co-occurrence matrix approach. Analysis of inter-class separability using transformed divergence method was performed to recognize the potential ...
Varun Narayan Mishra, Rajendra Prasad, Pradeep Kumar, Dileep Kumar Gupta, Prashant K. Srivastava   +4 more
openaire   +1 more source

Optimizing land use spatial patterns to balance urban development and resource-environmental constraints: A case study of China's Central Plains Urban Agglomeration.

Journal of Environmental Management
The unprecedented urbanization of the Central Plains Urban Agglomeration (CPUA) has significantly improved human well-being but has also led to severe land degradation and environmental challenges.
Zhi-Meng Jiang, Hao Wu, Zhenci Xu, Fang Shen, Nan Jia, Jincheng Huang, Anqi Lin   +6 more
semanticscholar   +1 more source

Use of the Topex–Poseidon dual-frequency radar altimeter over land surfaces

Remote Sensing of Environment, 2003
The capability of NASA radar altimeter Topex for land surface studies at regional or global scale is investigated. The analyzed data, available since mid-1992 consist of dual-frequency backscattering coefficients values (Ku and C band) estimated at the nadir pointing angle along the satellite tracks between 66jS and 66jN and averaged in 0.75j ground ...
Fabrice Papa, Benoı̂t Legrésy, Frédérique Rémy   +2 more
openaire   +1 more source

Self-modifying CA model using dual ensemble Kalman filter for simulating urban land-use changes

International Journal of Geographical Information Science, 2015
There are many different methods to calibrate cellular automata CA models for better simulation results of urban land-use changes. However, few studies have been reported on combination of parameter update and error control using local data in CA calibration procedures.
Yihan Zhang 0006, Xia Li 0001, Xiaoping Liu 0001, Jigang Qiao   +3 more
openaire   +2 more sources

Simulation of land surface fluxes using an improved dual-source model over row crops

IEEE International Geoscience and Remote Sensing Symposium, 2003
The classical Shuttleworth-Wallace two-layer model has a modification version proposed by Norman et al. (1995) and Kustas et al. (1999) to estimate evapotranspiration over row crop surfaces. However, the assumption of this modified model is controvertible, and more theoretical analysis and data validation seem necessary to figure out whether this model
Xiaozhou Xin, Qinhuo Liu, Qiang Liu 0009, Guoliang Tian   +3 more
openaire   +1 more source

Seasonal nitrate variations, risks, and sources in groundwater under different land use types in a thousand-year-cultivated region, northwestern China.

Environmental Research
The global public health concern of nitrate (NO3-) contamination in groundwater is particularly pronounced in irrigated agricultural regions. This paper aims to analyze the spatial distribution of groundwater NO3-, assess potential health risks for local
Dan Wang, Jian-Hua Wu, Peiyue Li, Lingxi Li, Jun-Yan Yang, Peng-Bin Zhang, Song He, Xiaomei Kou, Yong Wang   +8 more
semanticscholar   +1 more source