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Analyzing the Trend and Clustering of Groundwater Measuring Sites in Nadia and Burdwan Districts of West Bengal

材料科学与工程（中英文A版） 2015年第1期5卷 93-99页

作者： P.k. Sahu Vishwajith k.P. B.S. Dhek.le P. Mishra Department of Agricultural Statistics Bidhan Chandra Krishi Viswavidyalaya Mohanpur Nadia 741252 West Bengal

Agriculture is the back.bone of Indian economy; a substantial percent of GDP is still being contributed by agriculture. For the development of agriculture, assured supply of irrigation is needed. Groundwater plays an important role, not only in mitigating the problem of irrigation water for agriculture but also serves as source for domestic and industrial supply of water. As such fluctuations of groundwater table over the different periods of the year plays important role. In this paper, an attempt has been made to model the groundwater table in two agriculturally important districts namely Nadia and Burdwan. Time series data (2005 to 2013) recorded during January, May, August and November each year from a number of sites in each districts are used for study purpose. Various parametric model are used to delineate and model the fluctuations of groundwater tables for these two districts. Multivariate clustering technique using squared Euclidean distance measure and adopting complete link.ge method has been used to cluster 50 sites in Burdwan and 19 sites in Nadia district based on their groundwater fluctuations over the seasons. Analysis reveals that in both the districts three groups could be framed out of the 50 and 19 groundwater level measuring sites of Burdwan and Nadia, respectively. Discriminant analysis was also attempted to identify the contribution of different seasons in groundwater fluctuations during the clustering of the sites in each district. The authors are hopeful that the result of the study will help the planners in tak.ng cluster wise action plan for monitoring and maintaining the groundwater table in these two districts.

关键词：地下水位聚类技术水位测量站点孟加拉农业用水国内生产总值时间序列数据

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Observation of X-ray Lines from a Gamma-Ray Burst （GRB991216）:Evidence of Moving Ejecta from the Progenitor

Observation of X-ray Lines from a Gamma-Ray Burst （GRB99121...

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中国天文学会高能分会2004年学术年会

作者： L.Piro G.Garmire M.Garcia G.Stratta E.Costa M.Feroci P.Mszros M.Vietri H.Bradt D.Frail F.Frontera J.Halpern J.Heise k.Hurley N.k.wai R.M.k.ppen F.Marshall T.Murakami V.V.Sok.lov T.Tak.shima A.Yoshida Istituto Astrofisica Spaziale Consiglio Nazionale delle Ricerche （CNR） Via Fosso del Cavaliere 00133 Roma Italy Department of Astronomy and Astro-physics 525 Davey Lab Pennsylvania State Universi-ty University Park PA 16802 USA Harvard–Smith- sonian Center for Astrophysics 60 Garden Street Cambridge MA 02138 USA Istituto Astro?sica Spaziale Consiglio Nazionale delle Ricerche （CNR） Via Fosso del Cavaliere 00133 Roma Italy Istituto Astro?sica Spaziale Consiglio Nazionale delle Ricerche （CNR） Via Fosso del Cavaliere 00133 Roma Italy Istituto Astro?sica Spaziale Consiglio Nazionale delle Ricerche （CNR） Via Fosso del Cavaliere 00133 Roma Italy Department of Astronomy and Astro-physics 525 Davey Lab Pennsylvania State Universi-ty University Park PA 16802 USA Department of Physics Universita’Roma Tre Via della Vasca Navale 84 00146 Roma Italy Massachusetts Institute of Tech-nology 77 Massachusetts Avenue Cambridge MA02139 USA National Radio Astronomy Observato-ry 1003 Lopezville Road Socorro NM 87801 USA Istituto Tecnologie e Studio Radiazioni Extraterrestri/CNR Via Gobetti 101 40129 Bologna Italy Depart-ment of Astrophysics Columbia University New York NY 10027 USA Space Research Organization in the Netherlands Sorbonnelaan 2 3584 CA Utrecht Netherlands University of California Space Science Laboratory Berkeley CA 94720 USA Institute of Physical and Chemical Research （RIk.N） 2-1 Hiro- sawa Wako-Shi Saitama 351-0198 Japan. Univer-sity of Alabama NASA/Marshall Space Flight Center Huntsville AL 35899 USA NASA/Goddard Space Flight Center Code 661 Greenbelt MD 20771 USA Institute of Space and Astronautical Science 3-1-1 Yoshinodai Sagamihara Kanagawa 229-8510 Japan Russian Academy of Sciences Special Astrophysical Observatory Nizhnij Arkhyz Zelenchukskaya Karachaevo-Cherkesia 369167Russia NASDA Na-tional Space Development Agency of Japan WTC Building 2-4-1 Hamamatsu-cho Minato-ku Tokyo 105-60 Japan. Institute of Physical and Chemi

We report on the discovery of two emission features observed in the x-ray spectrum of the afterglow of the gamma-ray burst (GRB) of 16 December 1999 by the chandra X-ray Observatory. These features

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