Mullassery Canal Resiliency Framework

Page 7

SPONGE COLLABORATIVE +

WEAVING WITH WATER Team

MULLASSERY CANAL FRAMEWORK AND CANAL EDGE MASTERPLAN

1.2 Constraints and Opportunities - Precinct Level The city’s aging stormwater infrastructure and concretised canals are not designed to handle extreme events. The change in Kochi’s land cover leads the gray infrastructure network to often fail under moderate rainfall during the monsoons. Kochi’s stormwater capacity was designed for a landscape that has changed dramatically as green cover was replaced by built-up area and tree canopy within urban areas decreased. Simultaneously with an increase in likelihood of flooding due to extreme rainfall events, there is the potential for an increase in drought-incidence due to irregular rainfall and insufficient groundwater infiltration, which points to the likelihood of permanent changes in the hydrological cycle.

Precinct Level Challenges: (Based on the limited data available and Site analysis) 1.

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Increased flooding: The increase in impervious ground cover due to development generates more runoff after rainfall events. This generates peak runoff with very little lag time and overwhelms the stormwater system and canals. In traditional stormwater management, this runoff is quickly conveyed towards the backwaters or sea. The rush to flush away water increases flood risk while stressing the canals and reducing the potential for aquifer recharge. Increased water contamination: Lapses in solid waste management and unregulated sewage outfalls into waterways contaminate surface and subsurface water systems. Periyar and Muvattupuzha rivers as well as the aquifer are the main sources of drinking water that are threatened by the waste loop. Collection of solid waste debris and silt also compromises the efficacy of the stormwater system. Increased aquifer depletion: Over-extraction of groundwater along with zero groundwater infiltration, results in depleting the groundwater levels. This induces saltwater intrusion along the coast and seeps deeper into the region. This renders most of the present groundwater wells redundant and can induce drinking water scarcity during years of weak monsoon or extended droughts. Increased coastal erosion: Ernakulam and Kollam districts are placed second in position for coastal erosion among other coasts of Kerala. Climate change will increase the intensity of storm surges that further wash away coastal soil. Due to climate change and frequent storm surges most of the soil gets eroded. The construction of seawalls hastens coastal erosion as they amplify wave dynamics towards unwalled edges and prevent sediments from aggregating on coastlines. Unsafe streets for women: Although there are many institutions in the precinct, the streets are poorly lit and lack visibility from the community. Students and women feel unsafe using the streets at night, which further result in them dissociating from the city’s public space. The empty streets and open spaces also reduce the footfall for local businesses in the area. Inaccessible footpaths: Broken and fragmented footpaths make the streets a nightmare for vulnerable groups, including women, the disabled, and children. The dense network of streets in the city have been taken over by private motor vehicles and parking, leading to traffic congestion and an 8% increase in road deaths from 2018 to 2019. According to the Evangelical Social Action Forum’s study on Walkability and Pedestrian Facilities in Kochi, 2016-2017, 60% of the respondents expressed fear while crossing roads. Poor solid waste management:The city’s waste management system has not yet tackled residential, commercial, and medical waste despite the presence of organisations like Kudumbashree and Haritha Karma Sena. Solid waste is dumped into the canal, clogging the waterways or dumped on the streets, making it unattractive.


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D. An Integrated approach

2min
pages 98-100

3. Stakeholder Engagement

4min
pages 101-103

MOBILITY

3min
pages 87-92

4.2.4 Phasing of Pilot Projects and Long-term policy initiatives

0
page 83

Canal Cleanup Strategies

2min
page 95

4.2.4.3 Additional Pilots

1min
page 82

C. For collaborative governance and community participation

2min
pages 96-97

4.2.4.2 Subsite C - Pilot project

1min
page 81

4.2.4 Glimpse into Pilot Projects

0
page 79

4.2.3.1 Post-implementation Community Waste management Strategies

3min
pages 77-78

4.2.2 Implementation - Mobility framework

1min
page 74

Stretch F - Karunakaran Lane, Outside Jewish Cemetery

1min
page 68

Stretch G - Canal Mouth

1min
page 69

Stretch E - KMC Waste Collection Centre

1min
page 67

4.2.3 Implementation - Community framework

0
pages 75-76

Stretch D - Padikathukulam East colony

1min
page 66

Stretch B - Karikkamuri Neighbourhood

1min
page 64

Stretch C - Fashion Street

1min
page 65

Stretch A - Near KSRTC Bus Stand

1min
page 63

3.3 Comprehensive Canal Edge Masterplan

0
pages 60-61

Mobility

1min
page 58

Community

1min
page 59

Landscape

1min
page 57

3.2 Canal Rejuvenation Strategies

0
page 56

2.3.4 Principles

1min
page 51

2.3.6 People-prioritized community scenario

1min
page 53

2.3.7 Expected outcomes

0
page 54

2.3.5 Key components of community framework

2min
page 52

2.3.3. Approach - Existing scenario Vs Canal community scenario

2min
pages 49-50

2.2.6 Expected outcomes

0
page 46

2.3.2 Challenges and Opportunities

2min
page 48

2.2.4 Key components of mobility framework

4min
pages 43-44

2.1.9 Expected Outcomes

1min
page 39

2.1.6 Framework

0
page 31

2.2.2 Approach - Prioritizing motor vehicles Vs Prioritizing People

1min
page 41

2.1.8 On-Site Implementation of Sponge toolkits

3min
pages 37-38

2.1.7 Scenarios

2min
pages 32-36

2.2.3 Principles

0
page 42

2.2 Mobility Framework

1min
page 40

2.1.5 Key typologies of cloudburst network blue-green streets and open spaces

2min
pages 29-30

Concepts underlying vision document

2min
pages 15-16

Introduction

3min
pages 4-5

1.3 Sponge Approach for a Resilient Kochi: Investing in a Blue-Green Network to mitigate flooding and

2min
pages 2-3

improving the public realm

8min
pages 22-26

Precinct Level Challenges: (Based on the limited data available and Site analysis

3min
pages 7-8

1.4 Vision Statement

3min
pages 13-14

2.1.4 Principles of the Sponge Approach

2min
pages 27-28

Chapter 2: Framework for the Mullassery Canal Precinct: Adapt, Connect and Empower

3min
pages 17-18
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