Towards a better drainage system for Karachi
By Arif Hasan
As predicted in various newspaper articles and research monographs by Karachi’s academics, professionals and development activists, the monsoon rains have devastated the city. They will devastate the city again, irrespective of how much money is claimed to be invested on the rehabilitation of the city’s civic infrastructure, unless three important issues are understood and addressed.
First, Karachi’s civic infrastructure is not mapped or documented to monitor its scale and directions of its growth. Without proper documentation effective planning is simply not possible, even if funds are available. The city’s infrastructure has been laid piecemeal over time by the activities of the KMC, KPT, KWSB and various cantonment boards and cooperative housing societies. Ad-hoc changes and additions, on a large scale, have been made to it which have never been mapped. In addition, the infrastructure has also been altered by community organisations; MNA, MPA and councillor funds; and NGO projects. What is required to address this serious problem is the setting up of an autonomous mapping unit under the city government.
The mapping unit should collect all available documentation, digitize it, identify gaps in it and remove them through a process of surveys and their documentation. Updating of these maps should be a continuous affair. The establishment of such a unit would be a great gift to the planners, professional and academic institutions, NGOs and communities of Karachi, and above all, to the UCs and towns of the city, whose elected representative and technical persons would have easy access to information regarding their areas. The establishment of such a unit would make planning possible.
The other issue is that Karachi’s sewage disposes into its natural drainage system. It has to be understood that this is not by default but has been planned as such. Official policy seeks to change this. However, this change can only happen if we dig up thousands of kilometres of sewage lines and replace them or by establishing hundreds of pumping stations. Neither of these two options is feasible in financial or physical terms, and as such sewage will continue to flow to the sea through the nullahs of Karachi. Over time, these nullahas have clogged up with silt, garbage and encroachments. At many places they flow higher than the sewage lines and because of this, and because of their reduced capacity, there is flooding with the minimum of rains.
What is required is the desilting of the nullahs, securing their width, their conversion into box trunks and the setting up of small treatment plants, where they meet the sea or the creeks of Karachi. Where this process has been adopted (no treatment plants have been set up so far) such as for the Manzoor Colony, Welfare Colony and three nullahs in Orangi, there has been no flooding. Many cities have developed their sewage and drainage systems in this manner and the Orangi Pilot Project, Research and Training Institute has detailed documentation of how this can be done for Karachi along with the documentation of social and physical infrastructure in three hundred Karachi katchi abadis.
The third issue to be addressed is that there are no drains along the curbs of even major roads in Karachi. Rainwater flows through the roads to the nearest nullahs. Because of this roads are washed away and areas where there are depressions get filled up with water. It is, therefore, necessary for us to design our roads to take the pressure of flowing water. These areas should be filled up where possible, or they should be linked to the nearest disposal system that is available. The process of creating drains along the curbs is a long and expensive one and may take many years to be completed.
Documentation, plans, and policy decisions, are essential for development but do not bring about development. For a realistic policy, ground realities have to be taken into consideration and to implement policy and plans, effective institutions are required. Unfortunately, policy decisions regarding Karachi’s development plans and projects were not related to the realities on the ground or the priority needs of its citizens.
According to press reports and various government documents, Rs460 million were spent on the Karachi Development Plan-2000 (KDP), and Rs340 million have been spent on mass transit studies. But neither of the projects have yielded desired results and a UNDP-sponsored evaluation of the KDP-2000 had identified serious shortcomings.
On the implementation and management side, the KWSB has borrowed heavily from the Asian Development Bank (ADB) for development work. At present it owes the ADB more than Rs42 billion. The Board has very little to show for this huge debt except sewage treatment plants, that function at a fraction of their capacity, while Karachi’s sewage continues to flow into the sea.
The creation of effective planning and implementation institutions requires professionalism which cannot be acquired by state organisations because of their low salary structure. It is therefore necessary to explore other avenues, such as hiring professionals on contract. Also, professionalism cannot be created in planning, management and implementation institutions if they are subject to political considerations, as often in our case, of undemocratically appointed ministers and governors. Many of Karachi’s institutions, which had considerable expertise and knowledge, have been destroyed over time through a process of nepotism and decisions based on political expediency.
The City Nazim, who has inherited an almost physically ravaged city, with demoralized and ineffective management institutions, is now looking for money to set things right. It is hoped that he will take the ground realities of the city into consideration when taking policy decisions, and for doing this he will initiate a process of public consultation, with those individuals and institutions who have been working on the infrastructure-related issues of Karachi.

