DHARAMTAR PORT PVT. LTD. Regd. Office: JSW Centre, Bandra Kurla Complex, Bandra (East), Mumbai – 400 051. Phone : 022-4286 1000 Fax : 022-4286 3000 CIN : U93030MH2012PTC236083 Ltr. No. MH/DPPL/EIA/2015/03 Date: 04.06.2015 To, The Director (IA-III) Infrastructure and Miscellaneous Projects & CRZ (IMP & CRZ) Ministry of Environment, Forests & Climate Change (MoEF & CC) Indira Paryavaran Bhavan, Jor Bagh Road New Delhi- 110 003 Sub: Submission of additional information for the Environmental Clearance (EC) for proposed Expansion of the Dharamtar Jetty facility at Dolvi, Raigad, Maharashtra by M/s JSW Dharamtar Port Private Ltd. [F. No. 11-79/2013-IA.III] Ref.: Minutes of the 147th Meeting of Expert Appraisal Committee for Infrastructure Development, Coastal Regulation Zone, Building/Construction and Miscellaneous projects held on 23rd April, 2015 at the Ministry of Environment, Forest and Climate Change (MoEFCC), New Delhi Dear Madam, As per the reference cited above, we are herewith submitting the additional information sought by the expert appraisal committee for the environment clearance (EC) for proposed expansion of Dharamtar Jetty facility. In this regard, we request you to kindly consider our additional reports and include in the forthcoming meeting of the EAC of IMP & CRZ for the environmental clearance of the project. Your kind consideration in the regard is highly appreciated and obliged. Thanking You. Yours Sincerely, for JSW Dharamtar Port Pvt. Ltd. R R PATRA Vice President-Projects Additional Information Expansion of Dharamtar Jetty facility at Dolvi, Raigad, Maharashtra [F.No.11-79/2013-IA.III] Additional Information sought by the Expert Appraisal Committee - Infrastructure Development, Coastal Regulation Zone, Building/Construction and Miscellaneous projects, as discussed in the 147th meeting held on 23rd April, 2015 at Ministry of Environment, Forest & Climate Change (MoEFCC), New Delhi Additional Information no. 1. Provide details of the plots without mangroves. The PP may use Google imagery for this purpose. The plot details of the Dharamtar jetty facility is given in Figure 1 & 2. As appears in Figure 2, the village cadastral level map indicates the proposed jetty facility is lying on the land parcels. Dharamtar Port Private Ltd. Page 1 of 60 Additional Information Expansion of Dharamtar Jetty facility at Dolvi, Raigad, Maharashtra [F.No.11-79/2013-IA.III] Figure 1: Google map showing the Plots of the Dharamtar Jetty facility Dharamtar Port Private Ltd. Page 2 of 60 Additional Information Expansion of Dharamtar Jetty facility at Dolvi, Raigad, Maharashtra [F.No.11-79/2013-IA.III] Figure 1: Plots showing the land parcels on the village cadastral map Dharamtar Port Private Ltd. Page 3 of 60 Additional Information Expansion of Dharamtar Jetty facility at Dolvi, Raigad, Maharashtra [F.No.11-79/2013-IA.III] Additional Information no. 2. Specify changes in hydrodynamics of affected water body due to blocking effect of the piles on the river water course. NUMERICAL MODEL SIMULATIONS – HYDRODYNAMICS & SEDIMENTATION 1.1 Introduction 1.1.1 General The proposed Jetty for handling of the Captive Cargo for the JSW Steel, JSW Cement and other affiliated Industries of the JSW is proposed on the Right bank of River Amba, about 26 km from the sea deep inside the Dharamtar Creek. The Dharamtar Creek is mostly tidal, except for the monsoon flows when fresh water discharges in the river is experienced. But due to the relatively narrow catchment of the Amba River and the Barrage at Nagothane (19 km upstream of the proposed site of development), this freshet in the river gets ‘drowned’ by the tidal flow. Therefore, the flow can be safely assumed to be tidal round the year, though in the present model study, the upstream discharges in the river has been used as a boundary data for the flow computations. In order to predict the effect of flow regime in a creek or estuary or coastal waters, often times models are deployed. Numerical hydrodynamic modelling is a very handy tool to determine the effect on the flow pattern and computation of the siltation in the creek/river/coastal water, quickly and accurately. The other means is the Physical model, which is quite exhaustive and time consuming. In addition, shallow and narrow creeks are at a risk of being affected by ‘scale’ effect in a physical model. Accordingly, for the present study numerical modelling tools have been deployed. One of the techniques to remove the boundary distortions and consequent effect on the result, a larger area is taken in the initial model, known as Global model or Regional model. In this model, known data stations are relied upon for the boundary data, and the field data collection stations are relied upon for calibration of the model. The global model is essentially a coarse mesh model, and is primarily used for deriving the boundary data for the fine mesh local model; for more refined and localised results. In the present case, the global mesh model was set up using the available tidal data from the Revdanda tidal Station in the south and Worli Point (Bandra) tidal station on the north as boundary forces. This large area model, with tidal flows driving the flows inside the Dharamtar creek, which is the confluence of many creeks with many open boundaries, removes the inaccuracies likely to result from lack of data for these open boundaries of the numerous creeks in the Dharamtar Creek system. Since the ocean tides controls the flow regime in the creek and Dharamtar Port Private Ltd. Page 4 of 60 Additional Information Expansion of Dharamtar Jetty facility at Dolvi, Raigad, Maharashtra [F.No.11-79/2013-IA.III] with no or small freshets, the resulting hydrodynamics of the creek remain unaffected despite these shortcomings in the boundary data. Accordingly, the first step was to set up a global model with the tidal boundaries extracted from CMAP chart systems. The global or the regional model was calibrated by using the current and surface elevation data collected at the data station described later in the report. In the second step, boundary information from the calibrated global model was extracted and a local model (finer mesh) was set up. Since the model boundaries are extracted from a calibrated global mode, the correctness of the flow hydrodynamics in the local model is assured. 1.1.2 Modelling Objective The objectives of the mathematical modelling computation being carried out are as follows; 1. Compute the flow hydrodynamics near the proposed project location 2. Compute the current and other associated parameters in order to determine the likely effect on the shoreline of the creek. 3. Local effect due to the proposed Jetty on the estuarine hydrodynamics and morphology. 1.1.3 Brief Model Scheme In order to achieve the above objective the following modelling scheme was enforced for the computation of the desired parameters; 2D regional model with C-Map tidal data for existing conditions Calibration of the regional model using the site specific data collected 2D local model with boundary information extracted from global model Based on the mathematical modelling principles, the hydrodynamic models do not ‘see’ the pile supported structures as an obstruction. These effects are highly localised, and more so in a tidal environment where the flow is bi-directional. The local scour or eddies therefore are self-compensative. The proposed jetty at Dharamtar is on piles; hence the hydrodynamic of the River/creek area is not affected by these pile foundations. However, the proposed 50 m reclamation may have marginal effects on the flow hydrodynamics and this modelling exercise would try and compute the effect and present in this report. Dharamtar Port Private Ltd. Page 5 of 60 Additional Information Expansion of Dharamtar Jetty facility at Dolvi, Raigad, Maharashtra [F.No.11-79/2013-IA.III] 1.2 Site Location 1.2.1 Geographical Location Existing JSW Dharamtar Port is located on the right bank of Dharamtar Creek/Amba River near Dolvi village as shown in Figure 1 at approximate Latitude 180 42’ 19’’ North and Longitude 730 1’ 42” East. Figure 1: Location of the JSW Dharamtar Port on the Map of India (top) and on the map of Maharashtra (bottom) Dharamtar Port Private Ltd. Page 6 of 60 Additional Information Expansion of Dharamtar Jetty facility at Dolvi, Raigad, Maharashtra [F.No.11-79/2013-IA.III] The coast of Maharashtra, facing the Arabian Sea extends from latitude 200 07’ N near Bordi village on the Gujarat border to latitude 150 40’ N near Terekol in Goa. The stretch of the coastline is about 720 km. The general topography and bathymetry of the coastline in the Mumbai Region (the area of interest) extracted from Naval Hydrographic Chart No. 211, is given in Figure 2. It may be seen that the bearing of the shoreline is about 1900. The terrain along the coastline is hilly and is pierced by a number of indentations and tidal creeks penetrating deep inland, offering excellent protected locations for construction of ports. Two major harbours namely Mumbai Port and Jawaharlal Nehru Port have been developed utilizing the naturally protected Thane Creek. The main tidal creeks along the coastline from south to north, which are potential sites for port development, are Revadanda Creek (Kundalika River), Dharamtar Creek, Thane Creek, Mahim Bay, Malad Creek, Manori Creek and Bassein Creek (Ulhas River Outfall). Dharamatar creek is the creek created by the river Amba and other rivers and creek lets. Figure 2: Extracts of Hydrographic chart 2016 showing depths at the inner, outer anchorages and the Dharamtar creek Dharamtar Port Private Ltd. Page 7 of 60 Additional Information Expansion of Dharamtar Jetty facility at Dolvi, Raigad, Maharashtra [F.No.11-79/2013-IA.III] 1.3 Site Investigations 1.3.1 General The site investigations were carried out for collecting field data with regard to bathymetry of the area, tidal levels, current, salinity and total suspended solids (TSS) specific to the area.