1. INTRODUCTION - India Environment Portal

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entering the marine environment originates from land based sources including coastal refineries, municipal and industrial waste water discharges, urban run off and river flow. Thus there is an essential need to check these constituents in the coastal environment under study. The concentrations Petroleum hydrocarbons of the study area are shown in Table 3.11. Petroleum hydrocarbons range between ND to 16.8 µg/l in the entire study region. No variation was found in their concentrations between surface and bottom waters and are well within the normal limits of coastal waters. The samples collected at the Jatadharmohan Creek (Figure 1.6) were also analysed for the hydrochemical constituents to know the water quality of the creek. Samples were collected mainly at two stations, JMC -1 and JMC-2 (near Sulai and Noliasahi). The pH values varied between 6.78 and 7.49. DO values ranged between 8.54 mg/l and 9.02 mg/l whereas BOD 5 varied between 3.22 mg/l and 3.38 mg/l. Low salinity (1.66 psu and 3.33 psu) values were noticed in the creek region. The total suspended matter ranged between 11 mg/l and 15 mg/l in the creek region. The nutrient concentrations are high in the creek when compared to coastal waters. Nitrite (NO 2 ) varied between 7.14 µg/l and 10.2 µg/l; Nitrate was 90.2 µg/l, ammonia varied between 24.9 µg/l and 41.3 µg/l. High concentrations of total nitrogen (540 µg/l and 823 µg/l) and total phosphorus (107 µg/l and 161 µg/l) were observed in the creek showing the influence of organic load from the land run off and anthropogenic inputs. Very high concentrations of silicate (1322 µg/l and 1439 µg/l) concomitant with low salinity values indicate the influence of fresh water in the creek. Most of the seabed sediments collected in the study area were sandy sediments and only samples at stations N3, C3 and S3 were clayey. Clayey sediments were subjected to chemical analysis for trace metals. The concentrations of trace metals are given in Table 3.13. The concentrations of the trace metals in the sediments were within the threshold limits and no contamination was noticed in the bed sediments. 78
Table 3.13 Tracemetal elements in sediments in the marine environment off Jatadharamohan Creek Stations Cu Co Ni Mn Pb Cd Cr Fe (µg/g) (µg/g) (µg/g) (µg/g) (µg/g) (µg/g) (µg/g) (mg/g) N3 18.5 34.0 41.0 510 45 8.0 33.4 80.0 C3 32.0 26.0 44.0 502 30 5.3 30.0 64.0 S3 21.5 37.0 54.0 515 32 5.1 43.4 92.0 Cu = Copper Co = Cobalt Ni = Nickel Mn = Manganese Pb = Lead Cd = Cadmium Cr = Chromium Fe = Ferrous 3.5. BIOLOGICAL ASPECTS 3.5.1 Phytoplankton density Phytoplanktons are the basis of life processes in the ocean. Any manmade activity, disturb physico-chemical environment, which in tern affect phytoplankton and primary productivity at first level in the food chain. Phytoplankton counts were maximum at stn. S1 (surface) 6.5024 X 10 4 L -1 and minimum at stn. C2 (bottom) 0.987 X 10 4 L -1 . The sampling area falls under the influence of river runoff, which increases the turbidity resulting in low phytoplankton, count in the study area compared to other coastal waters. Counts at surface water were high at stns. N1, C2 and S1. Phytoplankton assemblages: The phytoplankton assemblage was very high in the coastal water of the study area. A maximum of 146 species of phytoplankton were observed and reported (Appendix 2a to 2c). Out of this 98 species belonged to diatoms, 44 dinoflagellates and 4 species of other algae. In the case of diatoms genus Chaetoceros was very common and along with 52 other species formed the dominant group of phytoplankton species. The other species of importance were Bacteriastrum, Biddulphia, Ditylum, Skeletonema, Thalassionema and Thalassiothrix. In the case of dinoflagellates Ceratium, Dinophysis, Protoperidinium and Pyrophacus were dominating. Other algae mostly consisted of Trichodesmium species which is known to form blooms along the coastal waters. These species are reported from the other coastal areas. 79
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1. INTRODUCTION POSCO intends to se
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FIGURE 1.1 LOCATION OF THE PORT 3
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FIGURE 1.3 SATELLITE IMAGERY OF THE
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the water depth of 9 m due to non-a
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The present DGPS system operates wi
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(Model 232-A), Trigger capacitor ba
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_______________ Spectral width para
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1.3.3. Water quality Parameters Thr
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1.3.3.4 Salinity The halogen compou
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degradation with possible contribut
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each station the net was towed for
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2. PROJECT DESCRIPTION POSCO, Korea
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FIGURE 2.1. LAYOUT OF THE HARBOUR F
Page 27 and 28: tranquil condition inside the port
Page 29 and 30: FIGURE 2.2. SAND MOUND TYPE REVETME
Page 31 and 32: Containment Dikes: The containment
Page 33 and 34: 3 BASELINE STUDIES Baseline data on
Page 35 and 36: erosional activity has been observe
Page 37 and 38: FIGURE 3.1 MAP SHOWING THE BATHYMET
Page 39 and 40: FIGURE 3.3 a TYPICAL SESIMIC SECTIO
Page 41 and 42: FIGURE 3.4 a TYPICAL INTERPRETED SE
Page 43 and 44: Line-40/1: (central line close to L
Page 45 and 46: 3.1.6 Side Scan Sonar The Side Scan
Page 47 and 48: 3.2 ENVIRONMENTAL CONDITIONS The st
Page 49 and 50: Bengal and in the vicinity of Parad
Page 51 and 52: 3.2.5 Visibility The monthly averag
Page 53 and 54: FIGURE 3.7 TRACK OF CYCLONE PASSED
Page 55 and 56: 3.5 3 2.5 Tide (m) 2 1.5 1 0.5 13 1
Page 57 and 58: Table 3.8 Joint distribution of Hs
Page 59 and 60: MAXIMUM SPECTRAL ENERGY(m 2 /Hz) 30
Page 61 and 62: N 330 30 300 60 W E 240 120 2.5 - 3
Page 63 and 64: 360 WATER DEPTH : 16 m MEASURED AT
Page 65 and 66: At location L2, the near surface (8
Page 67 and 68: N 330 30 300 60 W E 10% 20% 240 30%
Page 69 and 70: N 330 30 300 60 W E 10% 20% 240 30%
Page 71 and 72: 1010 1012 1014 1016 1010 1012 1014
Page 73 and 74: 0 Location 20 deg 13' 40.23" N : 86
Page 75 and 76: 3.4 WATER QUALITY CHARACTERISTICS I
Page 77: Table 3.12 Hydrochemical characteri
Page 81 and 82: Table 3.15 Bacterial population in
Page 83 and 84: Table 3.17 Composition and mean abu
Page 85 and 86: and N3 recorded highest diversity (
Page 87 and 88: Table 3.19: Abundance (no. /m 2 ) o
Page 89 and 90: Table 3.21 Abundance (no. /10cm 2 )
Page 91 and 92: 0 20 Similarity 40 60 80 100 S#1 C#
Page 93 and 94: Table 3.24 Percentage composition o
Page 95 and 96: Table 3.26 Estimated group-wise fis
Page 97 and 98: dry sandy beaches of Gahirmatha. Af
Page 99 and 100: strongly recommended used of TED in
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Appendix 1: Summary of soil investi
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FIGURE A2 SOIL PROFILE IN THE CREEK
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Appendix 2a List of Phytoplankton r
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Appendix 2a contd……… Sr.No. G
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Appendix 2b List of Phytoplankton r
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Appendix 2b contd…… Sr.No. Gene
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Appendix 2c contd…. Sr.No. Genera
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1. INTRODUCTION - India Environment Portal

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