Morphology and evolution of an alluvial fan-a case study of Kalanutala,Prakasam district,A.P.

Alluvial fans are the dominant landforms of the semi-aird and arid environments of the world. Studies on alluvial fans elsewhere suggest that there is a close relationship between the morphology of the fan and the drainage basin area; lithology, mean slope, vegetation, climatic and tectonic environments of the source area. An alluvial fan at Kalanutala village, in Prakasam district of Anthra Pradesh, has been studied in detail in order to analyse it's morphology and arrive at its geomorphic evolution. From a study of fan morphology and it's composition, it has been arrived, at the conclusion that there is a relationship between the fan and it's drainage basin (Kompayasela). Further, this study reveals that the apparent segmentation of the fan is not because of tectonic movement but due to the underlying topography of pediment. The study of fan morphology and its materials suggests that the initial deposition of fan took place in a humid climate, but gradually changed to the present arid climate.     

Morphotectonics of the Area Around Renukoot,District Sonbhadra,U.P. Using Remote Sensing and GIS Techniques

A part of Precambrian rocks of central India around Renukoot, district Sonbhadra, U.P., exhibits noteworthy differences in morphometric characteristics such as drainage density, mean stream length, bifurcation ratio and stream frequency across Son Narmada South Fault of the Son Narmada Lineament Zone. The Remote Sensing and GIS based present study explains the tectonic evolution of the terrain by dividing the area into two morphotectonic units namely Dudhi Morphotectonic Unit (DMU) and Mahakoshal Morphotectonic Unit (MMU) with the help of a proposed model. The study reveals that the landform features of the rocks of DMU and MMU of the study area are strongly controlled by underlying lithology and structures. The study also reveals different tectonic histories for the units until the last or the fourth phase of deformation dominated by shearing movement.     

Land use pattern of upper tons catchment district,Uttarkashi, U. P.

Aerial Photographs of 1:50,000 scale pertaining to Tons Catchment were used for generating a land use map showing cultivated lands, forests land, grass land, barren land with rock outcrops, snow and glaciers. The area was divided into 4 altitudinal Zones. More than 81% lies above 3000 m height and should be left for natural regeneration. Cultivated land occupies 4.97% of the area and is concentrated below 3000 m altitudinal zone and lies along river courses and on river terraces. Distribution of forest lands in altitudinal zone indicates that percent area covered under forest is higher than the average distribution of forest as reported by Seth (1978). Grass and open scrub, barren Innd with rock outcrops, glaciers and snow covered areas occupy 6.8%, 18.1%, 16.5% and 28.0% respectively.     

Perspect and assessment of groundwater resources using remote sensing techniques in and around Choral river basin,Indore and Khargone districts,M.P.

The study area around Choral river basin in the Narmada valley region, forms a part of Indore and Khargone districts of Madhya Pradesh. The geological, geomorphologic, lineament, hydrogeomorphic and groundwater potential zone maps of the study area have been prepared using IRS IC LISS III FCC imagery on 1:50,000 scale. Various litho-units, different land-forms, lineament fabric and hydro-geomorphic units have been worked out by visual interpretation methods and frequent field checks. The integrated hydro-geomorphological map of the study area reveals that the groundwater potential in denudation landforms such as buried pediplains, plateaus, denudational and residual hills is moderate-to-poor. On the other hand, the groundwater occurrence in structural landforms like structural hills, lineaments/faults and narrow gorges is likely to be good to moderate and the depositional landforms namely alluvial plains, valley-fills and meandering-channels favour the accumulation of sub-surface water and, therefore, may be considered as good recharge zones. From the point of view of groundwater occurrence, various hydro-geomorphic units have been classified as high, moderate and low potential zones.     

大地测量学专家石磐研究员

石磐，男，1936年生，河南偃师人。1960年解放军测绘学院天文大地测量系本科毕业，1965年该院研究生班地球重力场专业毕业。曾任总参测绘研究所副所长兼总工程师、中国测绘学会理事及名誉理事、大地测量专业委员会副主任、国际大地测量与地球物理联合会(IUGG)中国委员会委员、国际大地测量协会(IAG)会员。现为总参谋部测绘研究所研究员。