Evidences of Holocene transgression on Domingos Petrolini Swamp, southern coastal plain, Rio Grande do Sul, Brazil     

Soraia G.Bauermann  Paulo C.P.Neves  Marleni Marques-Toigo  Abdul R.Ashraf 《东北亚地学研究》2005,(Z1)

The Domingos Petrolini Swamp, located on the Southern Coastal Plain of Rio Grande do Sul, near the town of Rio Grande, constitutes an ample holocene lagoonal deposit. Events related to the holocene transgression and their diverse phases of glacial-eustatic ocillations were found through palynological analysis. Bases on these palynological data, four distinct phases to the paleoenvironmental evolution of the ecosystem were identified. It has also shown a transgressive restricted marine sequence on the base , which suggests the existence of a coastal brackish lagoon or a marisme type of environment. Later, there was a gradation for continentality conditions along with a scarce pollinical record. The third phase is characterized by the presence of marine components and halophyte vegetation, showing another transgressive event in that place. Lastly, the end of direct marine influence over the swamp was recorded and also the vegetation development as it appears these days.  相似文献   

Mapping and monitoring of urban landuse of Hisar Town,Haryana using remote sensing techniques     

AK Jain  RS Hooda  J Nath  ML Manchanda 《Journal of the Indian Society of Remote Sensing》1991,19(2):125-134

Aerial photographs for the year 1965 and 1975 and Landsat TM (FCC) 1986 data on 1:50,000 scale were used to map and monitor the pattern of growth and development of Hisar Town during the last 20 years. The different landuse categories identified are residential, commercial, industrial, recreational, vacant lands etc. The original shape of the town was nucleated one, but presently it is star-shaped, which is due to extension of the urban centre along the radiating roads. It has mainly elongated itself along the Delhi and Rajgarh roads. The presence of Government Livestock Farm (GLF), Equine Breeding Farm and HAU Farm towards North-west of the town has completely checked its growth on these sides. The total residential-cum-commercial area has nearly doubled during 1965–1975 and trebled by 1986. The change in net area under different types of urban land-use categories, described above has also been calculated. Degraded scrub lands and sandy wasteland on the fringes of the town have been identified where further development can be planned to avoid encroachment on good agricultural lands. Recommendations have been given for future urban planning of the town.  相似文献   

Considerations about the occurrence of pollen grains of theValeriana eichleriana （C. A. Muller） Graebner, in sediments ofthe Upper Quaternary in the state of Rio Grande do Sul, Brazil     

PauloC.P.Neves SoraiaG.Bauermann MariaG.Rossoni JoseR.R.Coiro MarleniM.Toigo AbdulR.Ashraf 《东北亚地学研究》2004,7(1):1-7

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