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Consultancy Services for design of rooftop Rainwater Harvesting, groundwater recharge and Wastewater treatment System under ZLD (Zero Liquid Discharge Project)

Consultancy Services for design of rooftop Rainwater Harvesting, groundwater recharge and Wastewater treatment System under ZLD (Zero Liquid Discharge Project)

BrightSpyre.comIslamabad, PK
30+ days ago
Job type
  • Full-time
Job description

Terms of Reference

Consultancy Services for design and feasiblity study that includes, surveys and development of designs, drawings and BoQs for Rooftop rainwater harvesting, groundwater recharge and wastewater treatment System at “Building of Biotechnology department” at Karachi University - Karachi

Assignment Information

Assignment Title :

Consultancy Services for design of rooftop Rainwater Harvesting, groundwater recharge and Wastewater treatment System under ZLD (Zero Liquid Discharge Project)

Published Date

12 Aug 2024

Proposal Submission Date

29 Aug 2024

Programme :

Climate Change & WASH Programme

Cluster / Project : N / A

Post Level : N / A

Contract Type : Consultancy Contract

Duty Station :

Office & Field level with travel to relevant departments

Expected Place of Travel :

Sindh Province of Pakistan

Contract Duration : 01 Months

About WaterAid

WaterAid is an international NGO working in 28 countries including Pakistan. Our vision is of a world where everyone everywhere has access to safe drinking water, improved sanitation, and good hygiene. Our mission is to transform the lives of the poorest and most marginalised people by enhancing access to improved WASH services. We support local organisations and government authorities to design and demonstrate appropriate, climate-resilient, inclusive, and sustainable WASH programmes. WaterAid also seeks to influence policy change to secure and protect the entitlements of marginalised and vulnerable people to safe, accessible, and affordable drinking water and sanitation services.

For more information, please visit www.wateraid.org

Background

WaterAid Pakistan has selected the Climate Change and WASH Aim as part of the new Country Programme Strategy (CPS). To take forward this Aim, evidence generation is an important component to roll out the strategy on ground, and to advocate for WASH in Climate Change integration and secure government and donor financing for this inclusion. The WASH & CC Programme Aim, undertakes the impact, and outcomes to take forward this intent.

The Context

The global rise in urbanization is placing greater stress on freshwater resources all over the world. The United Nations has projected that almost half of the world population will face water stress by the year 2050. In case of Pakistan, the Pakistan Council of Research in Water Resources (PCRWR) report stated that Pakistan touched the water stress line in 1990 and crossed the water-scarcity line in 2005. It is evident, according to the International Monetary Fund (IMF) Pakistan’s per capita annual freshwater availability has fallen below the water scarcity threshold of 1,000 m3. Population explosion, agricultural dominance, groundwater depletion, climate change, poor water quality, lack of storage reservoirs, absence of conservation practices and inefficient water management are a few of the factors contributing to this challenging issue. This multifaceted issue encompasses challenges related to quantity, quality, and sustainable management of water.

To reduce freshwater scarcity and wastewater discharge, implementing a wastewater recycling system for effluent can help lessen the strain on freshwater resources. The zero-liquid discharge (ZLD) technology is gaining attention as an effective water management solution in this regard. It focuses on maximizing water recycling and minimizing wastewater discharge. The demonstration of a small-scale ZLD system in a HCF holds immense promise for sustainable water management, environmental protection, and the well-being of future generations. By adopting the approach of ZLD, Health Care Facilities can play a pivotal role in conserving water resources.

Water withdrawals in Pakistan are high. The sum of annual surface water and groundwater withdrawals is around 184 billion cubic meters, or 78 percent of the total average annual resource. Adjusting for this double counting error suggests a net annual withdrawal of around 136 billion cubic meters, or 59 percent of the total renewable water resource[1]. An estimated 94 percent of withdrawals are for agriculture, 5 percent for municipal use, and 1 percent for industry [2].

Rainwater harvesting holds significant importance in the context of Pakistan, a country facing persistent water scarcity challenges. Pakistan is highly dependent on the Indus River system, which is the primary source of water for agriculture, industry, and domestic use. However, this water supply is under increasing pressure due to population growth, climate change, and mismanagement.

Pakistan's per capita water availability is decreasing, and many regions face water shortages. Harvesting rainwater offers an additional source of freshwater, particularly in areas with irregular access to surface or groundwater. Pakistan experiences heavy monsoon rains, which often lead to devastating floods. Proper rainwater harvesting infrastructure can help divert excess rainwater away from urban areas, reducing the risk of flooding and minimizing damage. Rainwater harvesting can enhance community resilience to climate change by providing a decentralized, reliable, and self-sustaining water supply, reducing vulnerability to droughts and water shortages. Rainwater harvesting promotes the efficient use of water resources and reduces the need for large-scale dam projects that can have ecological impacts.

In Pakistan, where water scarcity is a pressing concern, rainwater harvesting represents a valuable and sustainable solution to address these challenges, providing a lifeline to communities, agriculture, and the environment. Its successful implementation requires technical expertise, community involvement, and governmental support to maximize its benefits and ensure a more water-secure future for the country.

The WaterAid Pakistan is looking to acquire the services of a qualified firms / agencies for the purpose of designing of rainwater harvesting, underground recharge and wastewater treatment system in Karachi University at designated site of “biotechnology department” at District Karachi.

Geographic Focus

According to the MICS (2017-2018), in Karachi, 98.5% of the population have access to basic water services, 75.3% to basic sanitation, 89.2% to basic hygiene, while 5.1% still defecate openly. The literacy rate is higher compared to rural areas, yet still concerning, with 32% of the population being illiterate. Approximately 30% of the population lives below the poverty line, contributing to the under-five child mortality rate of 72 deaths per 1000 births. The impacts of climate change in Karachi are more pronounced in the coastal areas, where rising sea levels and increased flooding have exacerbated issues of water contamination and displacement. Additionally, urban heat islands, water scarcity, and air pollution are significant challenges, making Karachi a critical district for focused interventions.

In view of above, the following learnings are essential for undertaking the five years country programme strategy to implementation :

Project Deliverable :

  • Consultancy services for survey, layout and design of rooftop rainwater harvesting system including storage tanks at Karachi University at District Karachi.
  • Design of groundwater recharge well including filtration system for rainwater harvesting in open surface area such as lawn etc.
  • Design of ABR & constructed wetland for wastewater treatment including primary and secondary treatments capable of collecting, filtering, storing and reuse mechanism.
  • Preparation of technical drawings, BoQs and cost estimate for Rooftop RWH, groundwater recharge well and constructed wetland system.

Specific Objective :

  • To significantly reduce the departmental dependency on external water sources for non-portable water needs, aiming to cover a substantial portion of the demand through harvested rainwater.
  • To ensure that the system is environmentally sustainable, considering the life cycle and environmental footprint of the components used.
  • To create awareness and educate the healthcare facility community about the importance and technical aspects of rainwater harvesting and wastewater treatment system with a focus on its role in sustainable water management.

    • SCOPE OF WORK AND WORK ASSIGNMENT :

    Rainwater Harvesting System

    Conduct necessary surveys, prepare appropriate designs and construction drawings including layout plans and cost estimates for rooftop rainwater harvesting, underground recharge and wastewater treatment system at Karachi healthcare facility. The potential application of the harvested rainwater will be for gardening, cleaning, washing purposes, and in specific building flashing systems.

    Wastewater treatment system

    The wastewater treatment systems include designing and cost estimation of ABR and constructed wetlands by connecting existing wastewater channels of the facility. This should include each existing wastewater channel, septic tanks, or sanitation facility.

    Approach

    The scope of the project shall include, but not be limited to, the following activities :

    a. Hydrological Analysis :

  • Conduct a detailed hydrological analysis of the catchment areas to estimate rainfall collection potential.

    • b. System Design and Engineering :

  • Develop comprehensive rainwater harvesting, underground recharge and wastewater treatment system designs, including specifications.
  • Site analyses including all relevant and necessary tests.
  • Mapping roof areas – determining the contributing catchments.
  • Calculating volume of water off mapped catchment area (roof)
  • Gutters sizes and locations design to Minimize contamination from the catchment.
  • Estimating Storage Requirements, Tank design and location(s)Distribution system
  • Catchment and conveyance systems
  • Storage water tank / s with integrated overflow and siphoning systems.
  • Recharge pits and filtration system
  • Sprout Pipes and Valves
  • Faucet
  • Pumps and pressure tank
  • ABRs, constructed wetlands for wastewater treatment.
  • Any other relevant component required to achieve the efficiency of the project.

    • For assessment of scope of study, the proposed design information is provided below.

    Rooftop Rainwater Harvesting

  • Area of rooftop. 120’x279’ = 33480 square ft.
  • The rainwater harvesting system will be designed for catchment area of rooftop i.e 33480 Sft .
  • The approx. height of the building till ground level is 25 Feet .
  • The storage capacity will be designed as per rain intensity and based on annual rainfall. Storage capacity can be provided through 3 or 5 ply PVC water tanks which will be installed at grounds.
  • Pipe network and fittings will be used for standard and durable PVC material.

    • Groundwater Recharge.

  • Site assessment for suitability of groundwater recharge will be done by consultant.
  • Design of recharge well and boring will be done for groundwater recharge by connecting extra storage to recharge well.
  • The depth of boring will be around 150 to 200 ft . The casing and connection will be designed by the consultant.

    • Wastewater Treatment System.

  • Total functional toilet available in the buildings. 16 Nos .
  • Total user of the building. 800 Persons Daily
  • Approx discharge of Wastewater. 80 to 120 cubic meters per day
  • Design of ABR and wetland as per daily wastewater discharge.
  • The above technical information is mentioned for designing of proposed facilities. However, for any other information required the site visit can be done before submission of proposals.
  • The consultant will design the interventions on above mentioned benchmark design data.
  • The format of BoQs will be shared and approved before commencement of BoQs.

    • c. Monitoring and Control Systems :

  • Determine evaluation criteria and methods for measuring the success of the rainwater harvesting system after its implementation, including water balance assessments and cost savings analysis.

    • d. Maintenance Protocols :

  • Prepare a detailed maintenance protocol, including regular inspections, cleaning schedules, and repair procedures. It should be concise not more than 3-5 pages.

    • Deliverable and Timeframe : This service is for an estimated contract period of maximum 1 months. Perspective firms are requested to propose their approach, including the detailed design, work plan, flowchart, and timeline of activities referring to the desired deliverable :

    Deliverables :

    Deliverable

    Duration

    Submission of preliminary designs, drawings of the rainwater harvesting and wastewater treatment system

    15 week days after signing of the contract

    Submission of final design, BoQs, technical specification.

    01 Month after signing of the contract

    Total timeline

    1 Month

    Bi-weekly reporting or update from the selected firm / agency to WAP designated focal person in English language about the activities, updates, and any other related information.

    Specific Conditions :

  • Site visit is mandatory for all prospective firms before submitting their financial proposal.
  • Safety solution and overall aesthetics consideration in the design and drawings.
  • Prioritize the safety of workers, end-users, the healthcare facility, and community throughout the project, including safety audits.
  • The institution must carry out all necessary surveys including resistivity survey and hydrological analysis of the area. The cost of surveys, transport, lodging or any other testing should be included in the financial proposal. The WAP will not be responsible any payment other than the agreement under this consultancy.

    • Supervision

    The proposed assignment will be implemented with close coordination of WAP. The Consultancy Services (Firm) will report to the Provincial Manager -WAP Sindh and WASH Specialist at WaterAid Pakistan. Both the parties will coordinate through meetings and remotely via email, Teams, Zoom, and telecommunication.

    Standard Contract Terms & Conditions

    WaterAid practices the following terms and conditions stated below applicable to signing any contract with external agencies / consultants :

  • Intellectual Property Rights in all documents / information / other materials prior to the date of execution of an agreement pursuant to this bid shall vest in the Party to which such document / information / materials belong.
  • All Intellectual Property provided by WaterAid Pakistan to the Consultant for performing the obligations under the agreement with WaterAid shall remain the exclusive property of WaterAid Pakistan.
  • Any reports produced / data collected, or any other Intellectual Property generated by the Consultant pursuant to or under the agreement with WaterAid shall be the exclusive property of WaterAid Pakistan.
  • The vendor assumes all responsibility for complying with local legal codes as they apply to an Agreement and work performed there under. In addition, the vendor shall be liable to pay all applicable taxes and fees as required by the laws of government of Pakistan. WaterAid will deduct Income Tax and VAT at source as per Govt. rules.
  • The vendor shall not without first obtaining the consent in writing of WaterAid, permit any of its duties or obligations made under the Agreement to be performed or carried out by any other person or reassign his / her interest in the Agreement.
  • The vendor shall not hold WaterAid liable for any accident or misadventure befalling them whilst on duty or pursuing activities to fulfil the Agreement.
  • WaterAid reserves the right to accept and reject any proposal without assigning any verbal and or written rationale whatsoever.

    • Technical Evaluation criteria

    Firms with strong technical capacities are encouraged to Bid. Each firm shall submit technical and financial proposals in two separate sealed envelopes. Technical offers will first be evaluated according to the “evaluation criteria” below and the technical qualification threshold point is “70”. Financial offers of ONLY successful firms will be opened.

    a. Technical Evaluation criteria

    Criteria

    Score

    1) Relevance and Experience

    1.1) Relevant experience on designing of wastewater (ABR, Wetlands), rainwater harvesting and ground water recharge projects.

    2) Technology and Innovation

    2.1) Capacity to design innovative and environment friendly solutions for similar nature of projects

  • Financial Capacity

    • Financially Proposal will be evaluated including the financial capacity.

    Total

    b. Financial offer

    For Financial offer, each deliverable must be included in the financial offer. All deliverables MUST be completed within the assignment duration. Financial offer should include the cost incurred on surveys, designs, technical drawings, and preparation of complete BoQs work in all respect for rooftop rainwater harvesting system, wastewater treatment system and groundwater recharge.