Assessment of Flood Effect on Semi-Arid Special Investment Region Using 1D Hydrodynamic Modeling
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EGU 2020 Assessment of Flood Effect on Semi-Arid Special Investment Region using 1D Hydrodynamic Modeling AUTHORS CO-AUTHORS Dr S M Yadav, Professor Dr. Shri Ram Chaurasia, Professor. Surendra Borana, PG Scholar MMMUT, Gorakhpur(India) CED,SVNIT,SURAT(India) Dr.Mrs. N.D.Jariwala, Assistant Professor CED, SVNIT, Surat (India) AUSTRIA| 3 - 4 MAY 2020 Dr S M Yadav, Professor,CED,SVNIT,SURAT EGU 2020 Contents • Introduction • Theoretical Background in MIKE HYDRO River • Study area, data required and collected • Development of 1D Hydrodynamic model • Results and proposed flood mitigation measures • Conclusions and Discussions AUSTRIA| 3 - 4 MAY 2020 2 Dr S M Yadav, Professor,CED,SVNIT,SURAT EGU 2020 Introduction AUSTRIA| 3 - 4 MAY 2020 Dr S M Yadav, Professor,CED,SVNIT,SURAT EGU 2020 ● In search of better livelihood and lifestyle, every minute around 25 to 30 people are migrating to cities from rural area in India. If this pace of urban migration continues the urban population of India is likely to reach 600 million by the year 2030. (https://www.investindia.gov.in/team-india-blogs/india-preparing-biggest-human- migration-planet) ● To account for this immense stress on existing cities due to migration, India is in urgent need of new cities which ensure the better lifestyle and livelihood opportunities for the migrators. AUSTRIA| 3 - 4 MAY 2020 4 Dr S M Yadav, Professor,CED,SVNIT,SURAT EGU 2020 ● Fig. 1. Migration to urban centres in India (https://www.hindustantimes.com/analysis/migrants-aren-t-streaming-into-cities.html) AUSTRIA| 3 - 4 MAY 2020 5 Dr S M Yadav, Professor,CED,SVNIT,SURAT EGU 2020 ● The types of migrants ranges from highly skilled IT professionals to farm laborers having vision to seek better livelihood and lifestyle at the urban centers. ● These migrations highlighted the need for holistic planning, criticality of infrastructure – link development and availability of employment opportunities in the near vicinity. AUSTRIA| 3 - 4 MAY 2020 6 Dr S M Yadav, Professor,CED,SVNIT,SURAT EGU 2020 ● With this thought, Government of India launched the Delhi – Mumbai Industrial Corridor (DMIC) development project aiming to develop 24 new Industrial cities between the nation’s political capital (Delhi) and financial capital (Mumbai). ● As a part of Delhi – Mumbai Industrial Corridor (DMIC) project, Government of Gujarat aims to develop a largest investment node as Dholera Special Investment Region (DSIR). ● (https://www.investindia.gov.in/team-india-blogs/india-preparing-biggest-human- migration-planet) AUSTRIA| 3 - 4 MAY 2020 7 Dr S M Yadav, Professor,CED,SVNIT,SURAT EGU 2020 ● Fig. 2. Delhi Mumbai Industrial Corridor (https://dipp.gov.in/japan-plus/delhi- mumbai-industrial-corridor-dmic) AUSTRIA| 3 - 4 MAY 2020 8 Dr S M Yadav, Professor,CED,SVNIT,SURAT EGU 2020 ● Dholera Special Investment Region (DSIR) is a Greenfield Industrial City planned and located approximately 100 km South West of Ahmedabad. ● Total land area of DSIR is about 920 square kilometre (sq km) of which 520 sq km has been allocated for town planning and approximately 400 sq km falls under coastal regulation zone (CRZ) of Gulf of Khambhat. ● (http://dicdl.in/planning/?q=development_highlight) AUSTRIA| 3 - 4 MAY 2020 9 Dr S M Yadav, Professor,CED,SVNIT,SURAT EGU 2020 ● The proposed area principally comprises of mud flats with large parts under salt ingression from a network of intertidal channels connected to the Gulf of Khambhat. ● (http://www.gsdma.org/Content/flood-seismic-vulnerability-4206) ● The special investment region comprises of manufacturing areas, commercial areas, educational and skill development centers, banking and financial institutions, etc. AUSTRIA| 3 - 4 MAY 2020 10 Dr S M Yadav, Professor,CED,SVNIT,SURAT EGU 2020 ● The city will have smart and sustainable infrastructure spanning transportation, water, power, wastewater, drainage and urban design. ● By 2050, the city will have the capacity and resources to support a population of two million and provide employment for around 800,000 people. ● (https://aecom.com/projects/dholera-special-investment-region/) AUSTRIA| 3 - 4 MAY 2020 11 Dr S M Yadav, Professor,CED,SVNIT,SURAT EGU 2020 ● Fig. 3.Master plan & phase - wise development plan of DSIR Area (http://dicdl.in/planning/?q=development_highlight) AUSTRIA| 3 - 4 MAY 2020 12 Dr S M Yadav, Professor,CED,SVNIT,SURAT EGU 2020 ● DSIR is a delta region and is blessed by number of rivers starting from river Sukhbhadar in the north to Lilka, Utavali, and Padalio River at extreme south and local khadi (creek) namely Bhadar Creek, Vankol Creek, Bavaliyari Creek and Sonari Creek to Gulf of Cambay. ● Flooding is one of the natural calamity which can affect the DSIR as the terrain profile of DSIR is flat and low lying and is in the delta region of four rivers. ● (http://www.gsdma.org/Content/flood-seismic-vulnerability-4206) AUSTRIA| 3 - 4 MAY 2020 13 Dr S M Yadav, Professor,CED,SVNIT,SURAT EGU 2020 ● In the monsoon season, when there is heavy rainfall and high tide in the gulf of Cambay, the backwaters inundate the whole DSIR area for number days. ● (http://www.gsdma.org/Content/flood-seismic-vulnerability-4206) AUSTRIA| 3 - 4 MAY 2020 14 Dr S M Yadav, Professor,CED,SVNIT,SURAT EGU 2020 Fig. 4.Photographs taken during the site visit from 1 Oct 2019 to 4 Oct 2019 AUSTRIA| 3 - 4 MAY 2020 15 Dr S M Yadav, Professor,CED,SVNIT,SURAT EGU 2020 Fig. 5.Photographs taken during the site visit from 1 Oct 2019 to 4 Oct 2019 AUSTRIA| 3 - 4 MAY 2020 16 Dr S M Yadav, Professor,CED,SVNIT,SURAT EGU 2020 ● It is evident that the DSIR region is under considerable threat of flood hazards and when such huge investments is to be made in this region, it must be protected from flooding. ● To get a quantitative and qualitative judgement of the vulnerability of flooding in this region it is required to develop a hydrodynamic model of the region. ● In the present study MIKE HYDRO River software have been used for the development of Hydrodynamic model. AUSTRIA| 3 - 4 MAY 2020 17 Dr S M Yadav, Professor,CED,SVNIT,SURAT EGU 2020 Theoretical background of MIKE HYDRO RIVER AUSTRIA| 3 - 4 MAY 2020 Dr S M Yadav, Professor,CED,SVNIT,SURAT EGU 2020 ● Saint - Venant Equation: ● One dimensional unsteady flow, represented by Saint-Venant equations, i.e. conservation and Non-conservation form of Continuity and Momentum equation can be expressed as AUSTRIA| 3 - 4 MAY 2020 19 Dr S M Yadav, Professor,CED,SVNIT,SURAT EGU 2020 Where, 푥 = Longitudinal distance along the channel, 푡 = Time, 퐴 = Area along the cross section of flow, 푄 = Discharge along the channel, 푉 = Velocity of flow, 푦 = Water surface elevation, 푔 = Gravitational acceleration, So =Bed slope, 푆f = Friction slope AUSTRIA| 3 - 4 MAY 2020 20 Dr S M Yadav, Professor,CED,SVNIT,SURAT EGU 2020 ● Kinematic wave model: ● This is the simplest distributed model, in this local acceleration, convective acceleration and pressure term in momentum equation is neglected. ● The friction force is equal to gravity force So = Sf. ● This model is not used for the backwater effect, applicable in steep rivers often used for the calculation of runoff or to get the initial condition. AUSTRIA| 3 - 4 MAY 2020 21 Dr S M Yadav, Professor,CED,SVNIT,SURAT EGU 2020 ● Diffusive wave model: ● Diffusive wave model incorporates the gravity force, friction force and pressure term but neglects the local as well as the convective acceleration. ● This model is used to deal with the slowly propagating flood wave and backwater effect. AUSTRIA| 3 - 4 MAY 2020 22 Dr S M Yadav, Professor,CED,SVNIT,SURAT EGU 2020 ● Full dynamic model: ● This model incorporates all the terms in the Saint-Venant equation. ● The equation is classified as the partial differential equation. ● The propagation of wave takes place in an upstream and downstream direction as well which depend on Froude no. for the 1D model, based on the full dynamic wave equations are like HEC- RAS, MIKE 11 etc. AUSTRIA| 3 - 4 MAY 2020 23 Dr S M Yadav, Professor,CED,SVNIT,SURAT EGU 2020 ● These equations are nonlinear, partial differential equations with Q and y as dependable variables and x and t as independent variables. ● The exact solutions of these equations are not possible because these equations are not in their standard form. ● Therefore, approximate solutions are obtained by using numerical methods such as finite difference, finite element and other numerical techniques. AUSTRIA| 3 - 4 MAY 2020 24 Dr S M Yadav, Professor,CED,SVNIT,SURAT EGU 2020 Study Area, Data Sources & Data Collection AUSTRIA| 3 - 4 MAY 2020 Dr S M Yadav, Professor,CED,SVNIT,SURAT EGU 2020 ● The Dholera Special Investment Region (DSIR) is in the delta of four rivers starting from River Sukhbhadar in the North to Lilka, Utavli, and Padalio River at extreme south and local Khadi (creek) namely Bhadhar creek, Vankol creek, Bavaliyari creek and Sonrai creek. ● These rivers are east flowing rivers traversing through the DSIR area and discharges into the Gulf of Cambay. ● Sukhbhadar river is one of the major rivers traversing through the DSIR region and is taken as study area for the present study. AUSTRIA| 3 - 4 MAY 2020 26 Dr S M Yadav, Professor,CED,SVNIT,SURAT EGU 2020 Fig. 6. Map showing the rivers and its catchment area flowing through the DISR region (http://www.gsdma.org/Content/flood-seismic-vulnerability-4206) AUSTRIA| 3 - 4 MAY 2020 27 Dr S M Yadav, Professor,CED,SVNIT,SURAT EGU 2020 ● Sukhbhadar River originates from the Vadi Hills located at the village Chotila and is one of the west flowing rivers traversing through the DSIR area and eventually meets in the Gulf of Cambay.