Skip to main content
SpringerLink
Log in

Re-Estimating the Crop Water Requirement (CWR)

  • Chapter
  • First Online:
India's Water Future in a Changing Climate

Part of the book series: Advances in Geographical and Environmental Sciences ((AGES))

  • 21 Accesses

Abstract

Crop water requirements (CWR) are changing over a period due to climate change. The CWR derived with limited field data in the past using broad assumptions couldn’t represent the actual CWR to plan the water allocation in the present era of climate change. Reworking the crop water requirements (CWR), net irrigation requirements (NIR), and gross irrigation requirements (GIR) using scientific approach incorporating the climatic parameters has provided valuable insights into water allocation. CWR was re-estimated for different crops covering selected states in India. Comparing the NIR and GIR, at 60% efficiency level, only 66% more water is needed to meet the NIR, at 50% efficiency level, 100% more water is needed, at 40% efficiency level 150% more water is needed and at 30% efficiency level 233% more water is needed to meet the crop irrigation requirements indicating the importance of improving the project efficiency under growing water scarcity situations. Use of the re-estimated CWR is expected to alter the future irrigation demand scenarios in the country.

This is a preview of subscription content, log in via an institution to check access.

Access this chapter

Log in via an institution
Chapter
USD 29.95
Price excludes VAT (USA)
  • Available as PDF
  • Read on any device
  • Instant download
  • Own it forever
eBook
USD 129.00
Price excludes VAT (USA)
  • Available as EPUB and PDF
  • Read on any device
  • Instant download
  • Own it forever
Hardcover Book
USD 169.99
Price excludes VAT (USA)
  • Durable hardcover edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info

Tax calculation will be finalised at checkout

Purchases are for personal use only

Institutional subscriptions

References

  • Allen RG, Pereira LS, Raes D, Martin S (1998) Crop evapotranspiration. FAO Irrigation and Drainage Paper 56, Rome

    Google Scholar 

  • Annual Report (2015) All India coordinated research project on irrigation water management. Tamilnadu Agricultural University, Coimbatore

    Google Scholar 

  • CWC (2016) Summary report on water use efficiency studies for 35 irrigation projects. Central Water Commission New Delhi, India

    Google Scholar 

  • Food and Agriculture Organization (FAO) (1992) CROPWAT: a computer program for irrigation planning and management, by M. Smith. FAO Irrigation and Drainage Paper No. 46, Rome

    Google Scholar 

  • Food and Agriculture Organization (FAO) (1998) Guidelines for calculation of evapotranspiration. Irrigation and Drainage paper No: 56, Rome

    Google Scholar 

  • GOI (1976) National Commission on Agriculture (NCA). Ministry of Agriculture, New Delhi

    Google Scholar 

  • GOI (1984) A guide for estimating irrigation water requirements. Ministry of Irrigation. Water Management Division, New Delhi

    Google Scholar 

  • GOI (1999) Report of the working group on perspective of water requirements. National Commission for Integrated Water Resources Development Plan, Ministry of Water Resources, New Delhi

    Google Scholar 

  • GOI Indian Meteorology Department (IMD). Climatological normals 1980–2010, Pune

    Google Scholar 

  • ICAR (2015) Annual Report all India coordinated research project on irrigation water management. Tamilnadu Agricultural University, Coimbatore

    Google Scholar 

  • Irmak S, Allen RG, Whitty EB (2003) Daily grass and alfalfa-reference evapotranspiration estimates and alfalfa-to grass evapotranspiration ratios in Florida. J Irrg Drain Eng 129(5):360–370

    Article  Google Scholar 

  • Jensen ME, Burman RD, Allen RG (1990) Evapotranspiration and irrigation water requirements. ASCE manuals and reports on engineering practice (70). ASCE, New York

    Google Scholar 

  • Kashyap PS, Panda RK (2001) Evaluation of evapotranspiration estimation methods and development of crop-coefficients for potato crop in sub-humid region. Agric Water Manag 50:9–25

    Article  Google Scholar 

  • Palanisami K, Chandrasekaran B (2001) Improving irrigation efficiency. Water Technology Centre, Tamilnadu Agricultural University, Coimbatore

    Google Scholar 

  • Ramanathan SP (2002) Crop water requirement. Manual. Irrigation Management and Training Institute (IMTI), Trichy, India

    Google Scholar 

  • SankaraReddi GH, Yellamanda RT (2002) Efficient use of irrigation water. Kalyani Publishers, New Delhi

    Google Scholar 

  • United Nations (2019) Water policy brief on climate change and water

    Google Scholar 

  • Water Technology Centre (2016). Report on CWR Estimation (unpublished). PJTSAU, Hyderabad

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. International Water Management Institute, New Delhi, India

    Kuppannan Palanisami

  2. Norwegian Institute of Bioeconomy Research, Ås, Norway

    Udaya Sekhar Nagothu

Authors
  1. Kuppannan Palanisami
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Udaya Sekhar Nagothu
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Kuppannan Palanisami .

Rights and permissions

Reprints and permissions

Copyright information

© 2024 The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

About this chapter

Check for updates. Verify currency and authenticity via CrossMark

Cite this chapter

Palanisami, K., Nagothu, U.S. (2024). Re-Estimating the Crop Water Requirement (CWR). In: India's Water Future in a Changing Climate. Advances in Geographical and Environmental Sciences. Springer, Singapore. https://doi.org/10.1007/978-981-97-1785-9_8

Download citation

Publish with us

Policies and ethics

Search

Navigation