Flood Resilience and Spatial Planning in Pakistan: Where are we two years after the devastating flood?

by Frank van Steenbergen and Mohammed Ehsan Leghari

 

Flood resilience and the management of land and water resources

The floods of 2022 of Pakistan were episodical in their devastation – covering one third of the country. They were caused by unusual high rainfall, but in an equal measure they were the result of a distorted land management system that was unable to evacuate the high volumes of water.

The flood – following on flood events in 2010, 2011, 2012, 2016 and 2020 – triggered a highly needed discussion – how do we make sure that another undue water event does not create the same deep effect and lasting impact?  What changes are required? Do we need to change the system? Where do conventional flood embankments fit in, not always liked, not always well-constructed, and sometimes unnecessary? Instead, what is the alternative approach of avoiding that floods built up vehemently and become devastating?  And: can we turn the floods in an asset rather than a force of destruction? In summary: how do we create flood resilience in the land and water management system?

This is a major transition. The concept of resilience has a pendant in every field: raised flood proof houses, better medical systems, rethinking of the transport network, management of essential stocks, less vulnerable farm and livestock systems, more resilient education facilities. The thinking in general is that these are not separate investments, but add-ins and adjustments to make the system work better in general as well as perform under the duress that comes with floods or other disasters. Many of the improvements would be useful, even without contributing to better disaster preparedness.

Here we concentrate on flood resilience and spatial planning. In an earlier White Paper[1], issued in January 2023, the stronger combination of flood management with spatial planning was advocated. Several examples were highlighted where the impact of the 2022 floods were amplified because of the lay of the land and the infrastructure built on it, interfering in generally negative and only sometimes positive ways. In general, spatial planning in relation to flood management has not been given much consideration. This has given rise to distorted storm water removal, amplifying flooding, taking it to unexpected places and prolonging inundation. The White Paper argued for an overhaul of land and water management, so that in the future floods would not accumulate, but would be mitigated and even be put to beneficial use. Below is summary diagnosis of what hampers the land and water management systems and why heavy rainfall events may be expected to continue to hit hard.

 

Reduced capacity of the main Indus River to discharge floods
  • Bridges have restricted the active flood plain of the Indus. They also pond up water during floods causing undue pressure on the embankments.
  • The capacity of the river plains is reduced by encroachment and conversion into permanent farmland including the development of embankments and roads
  •  The construction of protection bunds inside the riverbed, particularly the OGDCL bund near Ghotki to protect the gas wells, has changed riverbed morphology
  • Non-operable gates on the main barrages have slowed down the through passage of floods
Blockage and distortion of the natural drainage paths by uncoordinated infrastructure development
  • Roads and railways with inadequate and concentrated cross drainage are standing in the way of the natural drainage patterns and have altered the run-off systems
  • The same has happened with canal and drain embankments, with super passages in several cases unable to adequately provide cross drainage and causing damage it to the irrigation and drainage canals
  • There are no escapes on drainage canals (such as LBOD) that were meant to remove excess water, but that during flood also carry stormwater, causing flooding in unwanted places, such as in Badin
  • Some flood protection structures interfering with floods in a detrimental way
  • As above, new housing estates and urban development, have also blocked drainage lines, causing flooding
Water logging in the farm areas ahead of the flood season
  • Water allocation in the shape of official irrigation duties is unbalanced in several command areas, causing water logging and high-water tables in canal command areas, reducing the capacity of the land to absorb flood run-off
  • This is aggravated by unauthorized diversions into the main canals, bringing the water system more out of balance

 

Progress made on improved flood resilience

This write-up aims to take stock of where we stand in terms of flood resilience and land and water management two years after flood. Was action taken or not after the events of 2022? What were the bottlenecks and what are the facilitators?  What can we learn>

In the earlier White Paper, several opportunities were proposed to improve flood water management by adjusting land and water management and invest in spatial planning in Pakistan. The opportunities consisted of:

  1. Reuse – optimizing beneficial use of flood water by spreading it to areas where it would enhance soil moisture, contribute to groundwater recharge, or to surface water storage.
  2. Retain and reduce – attenuate flood peaks by slowing down run-off, some in combination with reuse, preventing floods from rising quickly and become devastating.
  3. Remove – taking all steps to safely and timely evacuate flood water, by creating ‘space for the river’, enlarging the discharge capacity of the main Indus and the tributary drainage network.

We have assessed where we stand with the different possible actions under each of these three options.

OptionDescriptionAction
(1)   Reuse: making beneficial use of flood water
Flood water retention in upper catchmentsCatchment improvements and water retention in watershed reduces flood peaks, groundwater recharge, whereas as the same time Increasing soil moisture for productive use (crops and rangelands) in the upper catchmentsAttention for water retention in the upper catchments has increased – and is mentioned for instance in the new water policies of Sindh and Balochistan. Interest increases but programming at scale is not happening yet.
Flood water spreading in Kachhi PlainsReduces flood peaks, Increase soil moisture for productive use (crops and rangelands) by developing additional spreading and retention structuresIncreased spreading of high peak flood water in this area is planned in the Water Productivity and Safety Project – the plans are still evolving with discussion on conventional protection against new concepts of flood water spreading and addressing access to land issues.
Controlled overflows (escapes) on main Indus and, on RBOD and on LBOD (spinal drain),Release flood pressure by strategically placed main escapes, allowing flood water reuse in adjacent desert, and allowing nature development, as well as downstream prevent damageControlled overflows have not been taken further. On the main Indus river, it would be result in a complex discussion between the Provinces. In case of RBOD the plans have simply not matured enough to consider such details. In LBOD many cross-drainage improvements are under process, following the 2013 Left Bank Drainage Master Plan, but controlled overflows/ escapes are not in the plan.
Increase storage capacity of Manchar lake: raising embankments and spill waysLake remodelling to increase storage and Improve ecosystem functions, including fishery, combined with emergency pumping facilityThe storage capacity of Manchar lake has been increased with emphasis on irrigation, making it possible to increase capacity five-fold (from 10,500 to 50,000 cusecs).
Better flood management along Chasma Right Bank CanalRestore encroached flood carriers and put under better regulationThe flood carriers are being restored – by removing encroachment and restoring the bunds. The carriers are being transferred to the Provincial Government to address the vacuum in surveillance.
(2)   Retain and reduce improve cross drainage and attenuate flood peaks
Revisit cross drainage on roads and railwaysAssess cross drainage and retention capacity on restored and existing roads sections and plan modifications and removal of main bottlenecksDuring 2011 pluvial floods in LBOD and adjacent area (Khairpur, Nowshera, Benazirabad, Mirpurkhas and Badin district) a survey was undertaken. There were more than 350 places where natural waterway was hindered by canals, drains, roads, or railway tracks. The blockages on roads and railways have not been addressed.

 

Revisit cross drainage on canal and drainage embankmentsAssess cross drainage and retention capacity on canal and drainage embankments and plan modifications and removal of main bottlenecksIn KP several flood protection structures were decommissioned and not rebuilt after 2022 floods as they interfered with the overall flood water removal. On the Left Bank of the Indus in Sindh important construction work are being carried out to correct technical flaws in LBOD that cut the natural water way, several of these were identified in the Left Bank Master Drainage Plan of 2013.  Sindh government is also in the process of designing Sindh Coastal Resilience Project that will improve the Kotri surface drainage system, undertake reforesting, nature-based solutions and improving livelihood for deltaic communities. For the Right Bank of Indus (water from Balochistan and drainage within Sindh, cross drainage problems are known, but only restoration and reconstruction of the damages of 2022 floods are being undertaken, not or at best partly following the “Building Back Better” approach.
Revisit blockage of natural drainage paths and modification of run-off from hard surfaces by housing and other infrastructural developmentAssess main bottlenecks and systematically plan improved storm water drainage around critical areasThe key problem is that Integrated and adaptive flood management is missing. For example, the National Highway Authority and provincial roads department do not carry out hydrogeological survey in details and mainly hinder the natural water way even after witnessing flood disasters.

There is still a lack of stormwater management in and around cities and towns without new initiative being undertaken.

(3)   Remove: create space for the river and safely evacuate excess water
Bridge remodellingAssess criticality of bridges on river morphology and discharge capacity and consider remodelling of bridges and placing of spursThere is no overall plan or guidance on this. There are many problematic bridges. There have been internal discussions within Irrigation department and civil society has raised the issue. The bridge hindrances were badly felt during 2010 riverain floods.

The discussions on matter have not yielded any concrete actions with one exception enhancing the span for Jhirk- Mula Katiar bridge which is 1.7km against 3.17 km river width.

Manage flood plain capacityRemoving semi-permanent zamindari bunds and in revisiting road infrastructure developed in the flood plainsin the post 2010 floods government of Sindh through Revenue, Irrigation and other departments took initiatives and mainly zamendari bunds were removed.

The main action was taken by Supreme Court of Pakistan in a constitutional petition ordering formation of Flood Commission (December 2010). Supreme Court) has given comprehensive problem analysis and the responsibilities of the institutions

Manage obstacles in river plainAssess the position of obstacles in Indus plain – such as the OGDCL bund – and implement improvementsThere are few important initiatives at Government of Sindh, Irrigation department through Sindh Barrages Improvement Project (SBIP) (for Sukkur and Guddu Barrage). Key action includes Sediment management planning at barrages, comprehensive physical and numerical modelling (that includes the shoal and morphological changes).
Ensure optimized gate operationInstall better practice for gate opening on barrages during flood eventsThe Sindh Barrage Project is key project being implemented that includes changes of gates of Sukkur and Guddu barrage and their off taking canals. In addition, modelling studies on morphology. The formation of Barrage Management Unit for all three barrages is foreseen.
Increase flood water storage capacity within the irrigated areasAssess water allocation practice in the irrigated areas and implement measures to reduce water logging ahead of flood seasonWater logging (and salinity) has not been addressed at irrigation system level. Projects and programmes like land levelling, improving land drainage (by construction of surface drainage systems, improving them, installation of solar tube wells), community-based water logging and salinity subprojects, precision irrigation, smart and saline agriculture like actions are there but they operate at individual or small system level.

Conclusion

In response to the recent floods, action has been taken to restore flood damage and, in some cases, to make structural improvements toward better flood resilience. Redundant flood protection structures have been removed and cross drainage on canal and irrigation structure is being improved in the Left Bank of the Indus. Flood carriers are being restored under better management in KP and in Balochistan flood water spreading in considered.

At the same time several other necessary actions to improve flood resilience have not been undertaken. Where the actions would need coordination and cooperation with other Departments, such as the National Highway Authority or local government, little or no progress has been made. Similarly, issue that require much social engineering, such as adjusting water allocations to reduce water logging in the canal commands and increase the capacity to absorb floods. The same applies to addressing the encroachment of the flood plains. These are nevertheless important elements of ensuring flood resilience in Pakistan and need to be addressed too.

What is missing is an overall plan for flood resilience and an overarching institution at least at Provincial level to address these larger issues and come to effective cooperation and enforcement.  The new Water Policies in all Provinces however are creating the basis for such overarching water commissions and boards.

Downstream from setting the main governance structure right, work also needs to be done in better organization around several other critical tasks, in active spatial planning; inspection of main river canal and flood plain, including bathymetric surveys; inspection of flood and storm water management network and controlling of gates and operating procedures. Also, there is a need to improve enforcement: reduce unauthorized breaching at different level (bunds and drains); control encroachment of storm water drains; enforce land leases in flood plains and allowing beneficial use of public land for flood water overflows.

 

This discussion and its report took place under auspices of the Dutch Risk Reduction and Surge Support program (DRRS) of RVO, The Netherlands Enterprise Agency of the Dutch government.

 

References

[1] Jos de Sonneville, Ele Jan Saaf, and Frank van Steenbergen (2023), Improving flood resilience in Pakistan: A White Paper. The Hague: DRR RVO.

Dossier
Water and Development Partnership,Green Roads for Water  
Tags
RVO pakistan Green Roads for Water flood management 2022 Floods  
Date
June 26, 2024  
Views
 
Language
English 
Region
Pakistan 
Produced by
Frank van Steenbergen and Mohammed Ehsan Leghari