12 research outputs found
Environmental impact assessment of wetland ecosystem in India
The World Wetlands Day is celebrated on February 2 every year. It
marks the date of the signing of the convention on wetlands in 1971, in the Iranian city
of Ramsar on the shores of the Caspian Sea. This day was celebrated for the first time in
1997 and made an encouraging beginning. Subsequent World Wetlands Days have been
organized around such suggested themes such as the importance of water to life and of
wetlands to the supply of water and, in 1999, on "people and Wetlands: the Vital Link".
Each year, government agencies, non-governmental organizations, and groups of
citizens at all levels of the community have taken advantage of this opportunity to
undertake actions aimed at raising public awareness of wetland values and benefits in
general and the Ramsar Convention in particular.
The suggested theme for World Wetlands Day 2002 was 'Wetlands: Water,
Life, and Culture'. Wetlands are a storehouse of cultural heritage which takes many
forms, from human-made physical structures and artifacts, paleontological records in
sediments and peat, and mythological significance and the intangible 'sense of place'
felt by many for these wild and often mysterious sites and their wildlife (SACON,2002).
Wetlands as defined by the Ramsar Convention (1971) are areas of marsh, fen,
peat land or water whether natural or artificial, permanent or temporary, with water that
is static or flowing, fresh, brackish or salt including areas of marine waters, the depth of
which does not exceed six meters at low tide. Other equally relevant definitions of
wetlands are as follows:
Wetlands must therefore have one or more of the following attributes:
• At least periodically the land predominantly supports hydrophytes
• The substrate is predominantly untrained hydric soil
• The/substrate is non-soil and saturated with water or covered by shallow water
at some time during the growing season of each year.
The present study will look in to the following objectives.
1. To map the full extent of the wetland, the available habitat, water
Zonation/depth, and identify a manageable unit for conservation as core Zone.
2. To List out the plants and animals that are present in the marsh and prioritise
for conservation evaluation (example: details of threat status, rarity and
endemism)
A web GIS based study for managing mangroves of Krishna Delta, Andhra Pradesh, India
Mangroves are one among the most productive ecosystem which provide a wide range
of services to the coastal people, which includes the provision of food and timber products and coastal
defense services by reducing risk from coastal hazards. Several research found that mangrove forests
have been degraded throughout the world since 80s onwards due to anthropogenic factors and India is
no exception for the same. The current study was conducted in the Krishna’s wetland, which is
located in Krishna district of Andhra Pradesh (AP), South India, India. The Mangroves of Krishna is
second largest mangrove ecosystem in AP, fifth in East coast, eighth in India and it is rich in
biodiversity but highly vulnerable because of anthropogenic and natural factors which makes this
study area very scared. Information on Krishna mangroves and their geospatial information are owned
by different institutions to build this geospatial dataset as open to access everyone. The WebGIS is a
latest advancement and hybrid of GIS and Internet technologies for the dissemination of the
geospatial datasets and its variations through the web. The main objective of the current study is to
develop and demonstrate a WebGIS using open source software and integrate geospatial datasets of
the mangroves of Krishna into WebGIS platform and to analyse and assess areas that are degraded by
influenced parameters and in need of sustainable management.The result revealed that the area of
mangroves in Krishna was decreased from 2,454 ha in 1990 to 1,363 ha in 2000 to 1,339 ha in 2011.
On the other hand the areas of mangroves in the Krishna delta were increased to about 678 ha from
1990 to 2000 and 2,230 ha from 2000 to 2011. It may be pointed out that the variation in mangrove
covers in the study area due to land use conversion for different purposes and mangroves provides
coastal defense services by reduce risk of coastal hazards. It is may be concluded that this WebGIS
study is very useful and unique because it is sharing data through internet to everyone as it save
money, time and data duplication, which are needed to different stakeholders such as researchers,
decision makers, planners for the sustainable management of mangrove ecosystem
Water resource analysis of Minjur Block Thiruvallur district in Tamil Nadu using GIS and remotesensing
The study attempts to analyses the water resource availability and its condition in Minjur
block. It studies about the water level and its quality of the study area, and examine the
condition of water resource and its impact on local community. The region is facing problems
related to water level and quality due to industrial pollution, Water scarcity in part of the
district due to unfavorable hydro geological set up (Minjur Block). The area faces an alarming
situation related to ground water and its level of availability. The study attempts to explore
the need of water resources for agriculture and industrial of the region. The base map of
Minjur block prepared from survey of India Toposheet on 1:250,000 scale. Temporal variation
of water quality analysis will be using SPSS software. Rainfall data will be converted to
spatially for annual rainfall using GIS Tool. Satellite imagery has been used for land use
and land cover using remote sensing
A study on impact of municipal solid waste on groundwater in and around the dumping yard of Visakhapatnam, A.P, India
This study deals with physio-chemical characteristics of groundwater in the
environs of dumping yard (GVMC), Visakhapatnam district, Andhra Pradesh. The dumping yard
area is covering about 912 acres where study is carried out. Due to improper disposal of solid
wastes, Hazard urbanization, industrialization leading to contamination of groundwater have
been focused in this study. The improper and unscientific solid waste dumps in the unlined
sewage drains drive pollutants into the groundwater regime which is an irrevocable loss and
literally not possible to bring the quality of groundwater to its original state. The methodology of
the project consists of field survey, collection of data. The primary data is compared with
standard data (IS: 10500, 2012). 11 different groundwater samples were collected at
kamalanagar colony, paradesipalem school premises, kothapalem village, kapuluppada MSW
dumping yard ,thallavalsa (V), jayanthivani agraharam(V), Nedigattu(V), Chepalappada(V),
Kannuru (V),Pedamusidivada(V), Tadi(V) which are around the dumping yard (Kapulauppada)
during march 2016. The water samples are analyzed to identify the parameters of physical,
chemical and trace metals on the basis of APHA standard methodology
CEPF Western Ghats Special Series Ecology, distribution and population status of <i>Elaeocarpus venustus</i> Bedd. (Oxalidales: Elaeocarpaceae), a threatened tree species from Agasthiyamalai Biosphere Reserve, southern Western Ghats, India
This paper deals with the ecology, population size, status of regeneration, habitat degradation and threat status of Elaeocarpus venustus Bedd. An endemic and threatened tree species restricted to Agasthiyamalai Biosphere Reserve, southern Western Ghats, India. The population sites of this species in the study area were recorded using Global Positioning System and mapped using Arc GIS software. The population of this species is highly fragmented due to anthropogenic activities. The total stem count in all population sites from the study area was carried out to understand the population structure. A total of 181 saplings were recorded from the entire study area of which 180 are from a single site. Nearly 64% of the stems recorded in this study are mature stems. Poor regeneration was seen in population sites that were highly disturbed. In spite of good adult population, the low number of saplings shows poor germination of seeds and establishment of seedlings
Study of urban sprawl for patna city using remote sensing &GIS
Urbanization is the movement of population from rural to urban areas
and the resulting increasing proportion of a population that resides in urban rather than
rural places. Urban sociology is the sociology of urban living of people in groups and
social relationship in urban social circumstances and situation. Urbanization is a two way
process because it involves not only movement from village to cities and change
from agricultural occupation to business, trade, service and profession, but it also
involves change in the migrants attitudes, beliefs, values and behavior patterns. The
process of urbanization is rapid all over the world. The facilities like education,
healthcare system, employment avenues, civic facilities and social welfare are reasons
attracting people to urban areas.
Due to the rapid course of urbanization, the haphazard growth of major cities is
one of the challenging situations in front of any country. As unorganized urbanization is
becoming the major problem, it requires the immediate solution for sustainable
development of urban land. In the emerging scenario it is essential to have updated
information on urban growth patterns and its impact on the living environment. The
growth and development of cities are likely to continue and therefore there will be a
need for proper planning and managing or improving the existing infrastructure
facilities. In this juncture, the state of the art technologies Remote Sensing (RS) and
Geographic Information System (GIS) can play an imperative role. Patna metropolis is
one such rapidly developing city in Bihar. This paper explores the study of Urbanization
growth of Patna city using RS data and GIS.
The present study focuses on the nature and pattern of urban expansion of
Patna city over its surrounding region during the period from 1991 to 2008. Patna urban
agglomeration area consists of eleven constituents. Subsequently, two sample towns
from the respective zones were selected to study the pattern of urban expansion and
there from identify the factor responsible for the urban sprawl of Patna city. The study
has indicated that road and rail transport was solely responsible for the rapid urban
development in the sample towns. In addition, GIS based analysis of the pattern of
urban expansion over the demographic change and land use modifications has also
indicated that urban growth of the Patna city has mainly taken place linearly along the
major river Ganga in the study area