O AQUÍFERO FRATURADO CRISTALINO EM UM SETOR DO AGRESTE PARAIBANO

In the State of Paraíba the semi-arid climate and the geology of igneous and metamorphic rocks dominate, imposes serous limitations concerning the storage of groundwater. This work aimed to evaluate the fractured aquifer in Agreste Paraibano environment. This region stands out from the regional context of scarcity and plays an important role in the supply of water in periods without rain. This work evaluated 180 wells located in the fractured aquifer, encompassing 9 municipalities. All the studied well was from the Groundwater Information System (SIAGAS) database of Geological Service of Brazil (CPRM). The lithological, flow and salinity data of the waters were integrated with information on rainfall, vegetation cover and topography. In the central portion of the area (Alagoa Nova, Areia and Pilões) the greater productivity of the wells is accompanied by predominantly sweet waters. This scenario is possibly due to the higher incidence of rainfall in the sector and the presence of a thicker mantle of weathering, associated with the presence of the sedimentary rocks of the Serra dos Martins Formation.

Download Full-text

Influence of vegetation cover and crust type on wind-blown sediment in a semi-arid climate

Journal of Arid Environments ◽

10.1016/s0140-1963(03)00129-0 ◽

2004 ◽

Vol 58 (2) ◽

pp. 167-179 ◽

Cited By ~ 56

Author(s):

Joseph P Hupy

Keyword(s):

Vegetation Cover ◽

Arid Climate ◽

Crust Type ◽

Semi Arid

Download Full-text

The Metamorphic Rocks of Gunong Terendum, Kinta Valley, Federated Malay States

Geological Magazine ◽

10.1017/s0016756800087100 ◽

1931 ◽

Vol 68 (5) ◽

pp. 193-206 ◽

Cited By ~ 1

Author(s):

R. H. Rastall

Keyword(s):

Sedimentary Rocks ◽

The State ◽

Metamorphic Rocks ◽

Official Report ◽

Field Evidence ◽

The Government

IN a previous paper in this Magazine, as well as in an official report to the Government of the Federated Malay States and in a paper in the Mining Magazine, I have discussed in some detail the geological relations of the pregranitic sedimentary rocks of the Kinta Valley, in the State of Perak, F.M.S.1 The relations of the mainly calcareous Raub Series of Permo-Carboniferous age and the rocks generally known locally and colloquially as the “ Schist Series ” (Triassic and perhaps Rhaetic), formed one of the principal subjects on which I was requested to report to the Government. My conclusions were, I think, sufficiently clearly expressed in the publications quoted, and it is unnecessary to repeat here the arguments and field evidence which led me to those conclusions.

Download Full-text

Analysis of the State of Vegetation Cover in Oil Producing Complexes in the Tomsk Region

Химия в интересах устойчивого развития ◽

10.15372/khur2020231 ◽

2020 ◽

Keyword(s):

Vegetation Cover ◽

The State ◽

Tomsk Region

Download Full-text

STUDYING OF TERSKO-SULAKSKAYA LOWLAND VEGETATION UNDER THE RESULTS OF GROUND-BASED RESEARCH AND AUTOMATED INTERPRETATION

Vestnik of the Russian agricultural science ◽

10.30850/vrsn/2020/2/29-32 ◽

1970 ◽

pp. 29-32

Author(s):

M. I. Dzhalalova ◽

A. B. Biarslanov ◽

D. B. Asgerova

Keyword(s):

Plant Communities ◽

Satellite Imagery ◽

Vegetation Cover ◽

Anthropogenic Impacts ◽

Species Abundance ◽

Remote Sensing Data ◽

Indigenous Communities ◽

The State ◽

Anthropogenic Factors ◽

Internet Resource

The state of plant communities in areas located in the Tersko-Sulak lowland was studied by assessing phytocenotic indicators: the structure of vegetation cover, projective cover, species diversity, species abundance and elevated production, as well as automated decoding methods. There are almost no virgin soils and natural phytocenoses here; all of them have been transformed into agrocenoses (irrigated arable lands and hayfields, rice-trees and pastures). The long-term impact on pasture ecosystems of natural and anthropogenic factors leads to significant changes in the indigenous communities of this region. Phytocenoses are formed mainly by dry-steppe types of cereals with the participation of feather grass, forbs and ephemera, a semi-desert haloxerophytic shrub - Taurida wormwood. At the base of the grass stand is common coastal wormwood and Taurida wormwood - species resistant to anthropogenic influences. Anthropogenic impacts have led to a decrease in the number of species of feed-rich grain crops and a decrease in the overall productivity of pastures. Plant communities in all areas are littered with ruderal species. The seasonal dynamics of the land cover of the sites was estimated by the methods of automatic decoding of satellite images of the Landsat8 OLI series satellite for 2015, dated by the periods: spring - May 20, summer - July 23, autumn - October 20. Satellite imagery data obtained by Landsat satellite with a resolution in the multispectral image of 30 m per pixel, and in the panchromatic image - 10 m per pixel, which correspond to the requirements for satellite imagery to assess the dynamics of soil and vegetation cover. Lower resolution data, for example, NDVI MODIS, does not provide a reliable reflection of the state of soil and vegetation cover under arid conditions. In this regard, remote sensing data obtained from the Internet resource https://earthexplorer.usgs.gov/ was used.

Download Full-text