It was found that new mangrove, Table 3—Change detection in mangrove areas (km, Table 4—Composition and Ecological Status of, areas are emerging in Thane creek along the Navi, Mumbai stretch and in the Pascal Wadi stretch of, Malad creek. In addition, we identified several recurring limitations from previous studies. We also found that remote sensing plays an important role in revealing how the extent of mangrove forest responds to climate change and human impacts. IEEE Transactions on Geoscience and Remote Sensing. Their transit signal is dominated by dusty effluents forming a comet-like tail trailing the host planet (or leading it, in the case of. Approximate overall density of m, had the lowest density, while Thane region had the, Human factors critically influence the outcome. A study, carried out in 8 mangrove areas of Mumbai, west coast Relatively, luxurient formations and more number of species, occur in Ratnagiri and Raigad districts. The full extent of mangrove die-off was not immediately evident, and increased progressively through the first few months after the storm. IRS P6 LISS III images were used for mapping. To assess the ability of such observations to diagnose the dust composition, we simulate the transmission spectra from 5-14 $\mu$m for the planet tail assuming an optically-thin dust cloud comprising a single dust species with a constant column density scaled to yield a chosen visible transit depth. 1—Location of the Penner delta. 97 Present status of mangrove ecosystem in and around Mumbai (West Coast of India) B.G. Gewa (Excoecaria agallocha)‐Sundri (Heritiera fames) cover type areas have been increased at the expense of pure Sundri type. on (ICAR), Versova, Mumbai-400 061, India, on the scale of 1 : 50,000 from Indian Remote Sensing (IRS) satellite IRS-ID, mbai suburban region has been estimated to be 56.40 km, ring 1990 to 2001, a total mangrove area of, mangroves. This study utilized a 10-m resolution Sentinel satellite image series to document vegetation changes in a portion of the Florida Keys, USA, over which the core of Category 4 Hurricane Irma passed on 10 September 2017. Remote sensing and Geographical Information System technique have been used to map creeks, shrimp farms and shrimp hatcheries. Qureshi I M, Botanical silviculture features of mangrove It was the British who, upon realizing the strategic and commercial importance of the islands of the Arabian Sea, ordered for the clearing of the mangroves that rimmed the once-separated islands to create a continuous land mass then known as Greater Bombay. Mangrove forests are extremely important coastal resources, which are vital to our socio-economic development. Spectral analysis performed for the cases with and without vegetation very clearly portrays energy dissipation in the vegetation area as well as spectral changes. Historically, Mumbai mangroves covered around 75% of the region's coastline in stark contrast to less than 50% today (Central Water Commission). Finally, it is suggested to strictly implement some legislation, recently introducEd. However, Kandelia candal, Bruguiera gymnorhiza, Ceriops tagal, Lumnitzera racemosa are restricted to few localities. Ever increasing human population, habitat destruction and pollution along the Mumbai coast are some %PDF-1.5 %���� Yet, a systematic cognition of the unique contribution of remote sensing on studying mangrove forest extent dynamic is lacking, which prevents us from clearly identifying and further overcoming current deficiencies of studying the change of mangrove forest extent with remote sensing. 0000007388 00000 n The result obtained in the present work, regarding the zonation suggests that the mangroves, Mumbai follow the same pattern of distribution, the isolated creeks. Join ResearchGate to find the people and research you need to help your work. 0000002870 00000 n The large difference in, present study may be due to inclusion of mudflats. xref Further, mangrove areas can be easily categorized into two, categories of dense and sparse mangroves. Field checks, were possible mostly in the areas that are accessible, by roads. Aquatic Conservation, 24 (2), 256-274. Currently, mangroves on government land are deemed "protected forests" while those on private land are "forests". corrections to improve landscape change detection. As a result the density of mangroves in and around Mumbai has been on a decline. ��sUҹܖ. Zingde [14] reported that Mumbai has lost 40 % of all its mangroves in the past decade because of overexploitation and unsustainable demand for housing, slums, sewage treatment and garbage The main reasons for this depletion are reclamation of land for paddy cultivation, salt pan scheme, reclamation of land for building activities and dumping, industrial pollution of the creeks, cuttings of trees for fuel wood etc. Estimates of area of mangroves, in Mumbai based on previous studies using extensive, field survey techniques, varied from 248.7 km, shows the amount of destruction and degradation that, has affected the mangroves. CIR aerial photographs have been found most suitable for cover type analysis and other change detection study. The formation of these, marshlands can be traced to coastal alluvial, region falling between the co-ordinates 19, studied for the change detection part, as most of. Remote Sensing emerges as a valuable, tool for fast, efficient and accurate means of, information retrieval to detect causes, extent and, modification of structural changes over time. However, in the Thane, suburban region based on field studies is summarised, in Table 5. essential component in coastal marine ecological, cumbersome. Density of mangrove in Mumbai suburban region, 2001, All figure content in this area was uploaded by Geetanjali Deshmukhe, mangrove mapping and change detection around. (2001), Kulkarni et al. Therefore, in this review, we summarized remotely sensed extraction methods and data related to mangrove forest extent change monitoring and all discoveries from mangrove forest extent change observation and driver analysis. The. Table 2 describes the area of coverage of the classes of mangroves in the years PDF | Mumbai's mangroves have been significantly depleted through historical city development and continuing encroachment. This accounted for 39.32% decrease in, area under the mangroves. Mangroves destruction to blame for flooding of Mumbai: Experts. However, the RT and XO methods offer inherent advantages, and the future work to combine the elevation change detection methods to produce better estimates is warranted. The brackish water aquaculture covers an area of 45,000 hectare are produced. The species cultivated are mugil cephalus, Chanon-Chanos, Penaeus Monodon, P. indicus, Macrobrachium, etc. 0000004070 00000 n (2012) as shown in Fig. the rectangle (Iskapalli lagoon) is enlarged in Fig. The, present study deals with the extent, composition and, spread of the mangrove system in Mumbai and, change detection from A.D.1990 to 2001 with, The port city of greater Mumbai, along west coast, composed of a cluster of seven small islands, were connected by causeways, reclamation and filling, up of shallow marshy areas that separated these, land narrowing to a point at Colaba at its southern, extremity. The total area, coverage by each category i.e., sparse and dense, mangroves was estimated using the ArcView, Fig. Crustaceans like Penaeus monodon, P. indicus and fishes like Etroplus sp., mullets, etc are common in Indian mangroves. Association and location, mangroves with intertidal areas provided better, delineation accuracy. x���1 0ð4t�y\c=t��՞4mi����WO� �m The formation of these marshlands can be traced to coastal alluvial deposits, which are of recent formation. Carter Road is the only stretch on the entire west front where mangroves have recorded a growth in the last decade. Based on both fourth tasseled cap parameter and a haze optimized trailer The molluscan diversity was the highest in the mangroves of Versova, north-western Mumbai. For the sake, better co-ordination a single department such as, Forests may be made the nodal agency at the, level for conservation and development of, The present study demonstrated that satellite, remote sensing data is a valuable tool for the easy, assessment of mangrove habitat. Besides demarcating, the mangrove patches, the main railway and, Field checks were performed after the mapping of, data and classification of mangroves in the study area, was completed, to ascertain the accuracy of prediction, based on the remote sensing keys developed. Acting against alleged landfilling in mangroves and wetlands of Uran, ... crime news, current affairs, and a complete guide from food to things to do and events across Mumbai. 1096 0 obj<>stream 3, SEPTEMBER 2005, digitization. Experts predict that all 5,000 acres of mangroves that were decimated by voracious moths will be lush and green again by January Over the past few days, swathes of mangroves across Mumbai … 1. systems around the world. The total area of mangroves in Mumbai suburban region has been estimated to be 56.40 km² (including mud flats) with dense mangroves contributing 45.4% to the total. K2-22b), making these good candidates for transmission spectroscopy. & Chauhan H B & Nayak S, Landuse mapping of. Since s, In this paper, a optimized algorithm to recognize and remove hazes and However, they are fast disappearing owing to rampant construction and lack of governmental will for their protection. Digital maps with details incorporated through GIS techniques have been generated. Accessed November 29, 2017. This is a vital service to the city of Mumbai as it is very Its present area is about 6000.0 Sq. endstream endobj 1118 0 obj<>/W[1 1 1]/Type/XRef/Index[59 1034]>>stream However, mangrove forests were more negatively affected. (2005) and Lakshmi et al. 0000002067 00000 n It gives a possibility to add some beneficial nutrients to them. We find that silicate resonant features near 10 $\mu$m can produce transit depths that are at least as large as those in the visible. Additionally they are. 0000001357 00000 n NDVI patterns show that the severity of vegetation damage varied appreciably across the area, with the least damage on islands in the western sector of the hurricane’s eye and around its center, and greatest damage on islands just east of the eye. Mangrove ecosystems serve as a buffer between land and sea. New figures have been given for the mangroves of each concerned country especially for Myanmar. s.��X�4���k���o,$?q�n`�}�q!�?�̏Lqi�xy���̅�}u��}�����2�ؾȉ�/u3R�Ҳ� Based on the visual interpretation techniques the mangroves were sub-divided into 2 classes, viz., dense mangroves and sparse mangroves. Mangroves around Mumbai form a, fragile ecosystem that is exposed to pollution and, other demographic pressures. These mangroves support a rich diversity of life forms, especially molluscs. References & Resources. 0000018583 00000 n mangrove areas from non-mangrove areas. The scope of this study did not allow us to elicit spatial distributions of the various landcover types existing in the Lower Keys through multispectral classification techniques. The remote, sensing keys thus developed were used for classify, the variations – dense/sparse, in the mangrove growth, besides extensive field checks. The primary aim of the study is to estimate wave attenuation by mangrove vegetation using SWAN model in standalone mode, as well as SWAN nested with WW3 model for the Mumbai coastal region. 0000010906 00000 n Mangrove forests are, undergoing constant seasonal, short term, long term, changes due to their dynamic nature and, to a greater. You can support mangrove plantations, volunteer your time or become an advocate for our cause. An unprecedented biodiversity crisis caused by human activities such as degradation of habitat, The ecology of mangroves – Ann Rev Ecol Systema. Mangroves Is Important part of nature But We forget value of Mangroves In this video I'm telling important of video The area, under study was stratified into subgroups having, similar colour and a random sampling approach was, deployed to gather field information. The measured data presented wave height attenuation of the order of 52%. 0000005068 00000 n Using a uniform approach for quantifying uncertainties, we find that volume change rates at the drainage system scale from the four methods can be reconciled within 1-σ uncertainties in just 5 of 19 drainage systems. 20-26. Mangrove forests continue to disappear all over the world, they were It was observed that wave attenuation increases with an increase in drag coefficient, vegetation density, and stem diameter. study also reports 2 new distributional records for gastropods, namely Salinator fragilis and Auriculastra Mangroves of Mumbai Mangrove Destruction. single Landsat MSS/TM/ETM+ image, haze and clouds can be quantitatively All rights reserved. Model set-up and sensitivity analyses were conducted to understand the model performance to vegetation parameters. Around 5,000 acres of Mangroves across Mumbai and Navi Mumbai were recently found decimated after a series of moth attacks over the past few months.The region has started to show signs of rejuvenation with indication towards full recovery by the month of January. The area of coverage of sparse, and dense mangrove in the year 1990 and 1996 were, provided by IIT, Bombay. which will prevent satellite image from assessing land surface region. During 1990 to 2001, a total mangrove area of 36.54 km² was lost, indicating a 39.32% decrease in the area of mangroves. Change detection study has been made for the mangrove forest of the Sunderbans (Bangladesh) using remote sensing and other ancillary data (1933–1987). This study also highlights the importance of climate change and mangrove vegetation. molluscan species diversity from mangrove ecosystem along the Mumbai coast has been documented in integral part of mangrove ecosystems. methods using Release 634 ICESat laser altimetry data: repeat tracks (RTs), crossovers (XOs), overlapping footprints (OFPs), and triangulated irregular networks (TINs). Remote sensing technology was used to detect changes in the mangrove habitat around the Mumbai suburban region. Mumbai has probably lost 40% of all its mangroves in the past decade or so, largely because of reclamation for housing, All the, mangroves including saplings present in 5 replicate 25, plots were counted; the average numbers were, estimated and presented as population density for, The maps depicting the distribution of sparse, dense mangroves area for 1990 and 1996 were, obtained from the Indian Institute of Technology, (IIT), Mumbai. Field survey conducted in 2001 and early 2002. and field survey done by IIT Bombay, Mumbai in, preparing the CRZ maps of the region). dense to dense, dense to sparse, dense to others, The study revealed that mangrove coverage during, visual interpretation techniques the mangroves were, sub-divided into 2 classes, viz., dense mangroves and, sparse mangroves. Proceedings of SPIE - The International Society for Optical Engineering. 0000018350 00000 n Mumbai as mentioned before is the financial capital of India, these floods cause huge heavy damages to Indian economy along with these they also cause a huge loss of life property and cattle, giving rise to diseases and emotional disturbances for those who survived. Based on this, the over all accuracy of, mapping was found to be about 90%. Measures have been suggested for conservation and management of mangroves of Mumbai on a sustainable basis. For com, purpose, ground truth data were collected from, Manori, Malad, Mahim, Mahul and Thane creek, Table 5—Density of mangrove in Mumbai suburban region, 2001, In India a number of workers have carried out, change detection studies using remotely sensed, . MUMBAI: Mumbai Metro Rail Corporation (MMRC) along with Maharashtra State Forest Department has initiated a compensatory mangrove plantation drive at Koparkhairane in Navi Mumbai. A total of 10 rivers, 24 creeks and 2435.16 ha of mangrove area were identified and mapped. MANGROVES IN GENERAL INTRODUCTION Mangroves are a group of plants that occur in the coastal intertidal zones of tropics and the sub-tropics. 0 properties can be obtained from Cloud radar. 1093 26 Conversion of mangroves for coconut and paddy cultivation alongwith setting of fish ponds is an age old practice in coastal India and is called as 'filtration' or 'trapping'. The total area of mangroves in Mumbai suburban region has been estimated to be 56.40 km2 (including mud flats) with dense mangroves contributing 45.4% to the total. At the advent of the British rule the forest was double their present extent. been proposed. by Ministry of Environment and Forest for the conservation of coastal zones like mangroves. PDF | Remote sensing technology was used to detect changes in the mangrove habitat around the Mumbai suburban region. Hindustan Times (2017, November 4) Real-time satellite imagery to help track health of mangrove forests in Maharashtra.
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