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Shivhare Vikash Gupta Chanchal Mallick Javed Singh Chander Kumar 《Natural Hazards》2022,110(1):545-561
Natural Hazards - Geographical information system and remote sensing are proven to be an efficient tool for locating water harvesting and recharge structures, groundwater potential, runoff,... 相似文献
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The western part of the Shuqra volcanic field consists of a wide area of geologically recent alkali basalt flows and numerous cinder cones, overlying a faulted monoclinal sequence of Jurassic limetones dipping towards the Gulf of Aden and themselves overlying Precambrian basement. The volcanic activity is substantially younger than the series of central vent volcanoes forming the Aden line somewhat to the west along the coast, and the volcanic products are more uniformly basaltic and more silica-undersaturated than those of the Aden volcanoes. Preliminary chemical data reveal an unusual whole-rock compositional trend within the Shuqra lavas which is not explicable in terms of the fractionation of the sparse phenocrysts they contain. A widespread suite of megacrysts not in equilibrium with their host liquids includes hornblende, pleonaste spinel, olivine, plagioclase and clinopyroxene. These may have a close genetic connection with the lavas and possibly represent fragments of refractory source material. 相似文献
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Hasan Raja Naqvi Javed Mallick Laishram Mirana Devi Masood Ahsan Siddiqui 《Arabian Journal of Geosciences》2013,6(10):4045-4056
The present comparative study is multi-temporal in nature. The Revised Universal Soil Loss Equation (RUSLE), remote sensing, and GIS were used to model the soil loss estimation for soil conservation and vegetation rehabilitation in Nun Nadi watershed for the years 2000 and 2009. The estimated mean soil loss for the year 2000 and 2009 is 3,283.11 and 1,419.39 Mg?ha?1 year?1, respectively. The study finds that about 80 % area has low or least risk of erosion and about 7 % is exposed to high or very high risk which indicates the improvement in terms of soil loss if we compare the data of both the time periods. The findings show that the rainfall, LULC change, and elevation are the main responsible factors for the soil loss in Nun Nadi watershed. Conservation measures have been adopted; however, the problem still remains serious and demands urgent attention. 相似文献
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Ayyaz Mallick 《Urban geography》2018,39(7):1113-1120
This paper aims to explore the emergence of reconstituted political subjectivities in urban Pakistan. Specifically, the paper will focus on an emerging hegemonic project which centers the socio-political articulations and aspirations of middle class fractions that have emerged in the country in the wake of post-1980s economic liberalisation. Detailed light will be shed upon the (proto-)hegemonic aspirations of a distinct fraction of the middle class and its spatial articulations most eminently expressed through measures towards and longings for the “world class city”. As such, claims over space, urbanity and nation/citizenship which serve to mediate this proto-hegemonic project will be investigated. The paper will conclude with a brief consideration of the limits of such an hegemonic project, especially with regards to subordinate classes in Pakistan. 相似文献
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Suryendu Dutta Monalisa Mallick Runcie Paul Mathews Ulrich Mann Paul F. Greenwood Rakesh Saxena 《Journal of Earth System Science》2010,119(5):711-716
The terpenoid composition of resins from the Miocene lignite horizons from the Kerala-Konkan Coast, western India was analyzed
by Curie-point pyrolysis-gas chromatography-mass spectrometry (Cupy-GC-MS). The major pyrolysates were cadalene-based bicyclic
sesquiterpenoids including some C30-C31 bicadinenes and bicadinanes typical of dammar resin from angiosperm plants of Dipterocarpaceae family. These plants are typically
supported by tropical climates which the western Indian region was known to have experienced during early Tertiary period.
The present study suggests that these palaeoclimatic conditions persisted until at least the Miocene epoch. These sesquiterpenoids
which are commonly detected in many SE Asian crude oils may be utilised as useful biomarkers for petroleum exploration in
the western Indian region. 相似文献
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Yalchin Efendiev Akhil Datta-Gupta Xianlin Ma Bani Mallick 《Mathematical Geology》2006,38(8):1031-1035
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Javed Mallick Yasser Alashker Shams Al-Deen Mohammad Mohd Ahmed Mohd Abul Hasan 《国际地球制图》2013,28(8):915-940
Soil erosion is the most important factor in land degradation and influences desertification in semi-arid areas. A comprehensive methodology that integrates revised universal soil loss equation (RUSLE) model and GIS was adopted to determine the soil erosion risk (SER) in semi-arid Aseer region, Saudi Arabia. Geoenvironmental factors viz. rainfall (R), soil erodibility (K), slope (LS), cover management and practice factors were computed to determine their effects on average annual soil loss. The high potential soil erosion, resulting from high denuded slope, devoid of vegetation cover and high intensity rainfall, is located towards the north western part of the study area. The analysis is investigated that the SER over the vegetation cover including dense vegetation, sparse vegetation and bushes increases with the higher altitude and higher slope angle. The erosion maps generated with RUSLE integrated with GIS can serve as effective inputs in deriving strategies for land planning/management in the environmentally sensitive mountainous areas. 相似文献