Martijn de Klerk (MSc.) is financial manager and flying sensor expert at FutureWater with over seven years of working experience in managing and executing international projects in the fields of water management, irrigation and agriculture. Martijn received his master degree in Environmental Sciences at Wageningen University, where he gained broad experience in planning and organizing projects, and worked both as a consultant and scientific researcher.

His technical expertise embraces drone and satellite image processing and interpretation, GIS analysis, and water allocation modelling, both at the level of a single field and an entire river basin. Countries of work experience include The Netherlands, Spain, Mozambique, Kenya, Ghana and South Africa.

Over the past years Martijn had a predominant role as project manager of FutureWater’s agricultural flying sensor (drone) projects in Mozambique, Kenya and Ghana. In these projects, successful local enterprises were established that provide a low-cost drone service to small- and largescale farmers. The high-resolution drone images, which are made by trained local operators, indicate crop stress, around ten days before it can be detected by the naked eye. This early-warning decision tool gives farmers the possibility to take preventive measures, reducing crop loss and thus increasing yields and farmer’s income. In some projects the images are also used for an innovative (water) productivity analysis in combination with crop growth modelling.

Related projects

  • TWIGA: Transforming Weather Water data into value-added Information services for sustainable Growth in Africa

    TWIGA aims to provide actionable geo-information on weather, water, and climate in Africa through innovative combinations of new in situ sensors and satellite-based geo-data. With the foreseen new services, TWIGA expects to reach twelve million people within the four years of the project, based on sustainable business models. The TWIGA…

  • Flying Sensors for Ultra-High Resolution Flood Risk Identification at Local Scales

    The outputs of this project can be summarized as providing real time dike and levee information at local scales (up to 10,000 ha) that is collected, analysed and used at the same local scale. The output is divided into two components. First, the Flying Sensor information will be used for…

  • Water Resources Model for the Kenate Basin in South-Sudan

    As there is an urgent need for informed decision making in ongoing and upcoming land and water resource development plans, the governments of South Sudan and the Netherlands (GoN) initiated a program for the Water Sector in Eastern Equatoria State (ProWasEES). The overall objective of this program is that “Kenate…

  • Fresh Water Options Optimization

    This project identified opportunities for innovative solutions that decrease local fresh water shortages in economic vulnerable regions under increasing water stress (droughts, salinization). The project demonstrated the business potential of fresh water solutions for a case study area with intensive agriculture within the Valencia region, Spain. FutureWater’s role in this…

  • ThirdEye: Flying Sensors to Support Farmers’ Decision Making

    The ThirdEye project supports farmers in Mozambique and Kenya with their decision making in farm and crop management by setting up a network of flying sensors operators. Our innovation is a major transformation in farmers’ decision making regarding the application of limited resources such as water, seeds, fertilizer and labor.…

Related publications

  • 2022 - InfographicVan Opstal, J.D., M. de Klerk, 2022. APSAN-Vale Water Productivity Analysis: Irrigation Season 2021. Infographic.X

    APSAN-Vale Water Productivity Analysis: Irrigation Season 2021

    Van Opstal, J.D., M. de Klerk

  • 2022 - InfographicVan Opstal, J.D., M. de Klerk, 2022. APSAN-Vale Water Productivity Analysis: Irrigation Season 2021 (in Portuguese). Infographic.X

    APSAN-Vale Water Productivity Analysis: Irrigation Season 2021 (in Portuguese)

    Van Opstal, J.D., M. de Klerk

  • 2022 - FutureWater Report 236Van Opstal, J.D., M. de Klerk, V.R. Hollander. 2022. APSAN-Vale Water Productivity Analysis: Irrigation Season 2021. FutureWater Report 236X

    APSAN-Vale Water Productivity Analysis: Irrigation Season 2021

    Van Opstal, J.D., M. de Klerk, V.R. Hollander

  • 2022 - FutureWater Report 236Van Opstal, J.D., M. de Klerk, V.R. Hollander. 2022. APSAN-Vale Water Productivity Analysis: Irrigation Season 2021 (in Portuguese). FutureWater Report 236X

    APSAN-Vale Water Productivity Analysis: Irrigation Season 2021 (in Portuguese)

    Van Opstal, J.D., M. de Klerk, V.R. Hollander

  • 2021 - Technical reportVan Krieken, K., E. Memelink, M. de Klerk, J. van Opstal. 2021. Interventions Impact Analysis: Rainfed Season 2020-2021 (in Portuguese). Technical report.X

    Interventions Impact Analysis: Rainfed Season 2020-2021 (in Portuguese)

    Van Krieken, K., E. Memelink, M. de Klerk, J. van Opstal

  • 2021 - Technical reportVan Krieken, K., E. Memelink, M. de Klerk, J. van Opstal. 2021. Interventions Impact Analysis: Rainfed Season 2020-2021. Technical report.X

    Interventions Impact Analysis: Rainfed Season 2020-2021

    Van Krieken, K., E. Memelink, M. de Klerk, J. van Opstal

  • 2021 - FutureWater Report 227Van Opstal, J.D., M. de Klerk, V.R. Hollander, J.E. Beard. 2021. Apsan Vale Water Productivity Analysis: Rainfed Season 2020-2021 (in Portuguese). FutureWater Report 227X

    Water Productivity Analysis: Rainfed Season 2020-2021 (in Portuguese)

    Van Opstal, J.D., M. de Klerk, V.R. Hollander, J.E. Beard

  • 2021 - FutureWater Report 227Van Opstal, J.D., M. de Klerk, V.R. Hollander, J.E. Beard. 2021. Apsan Vale Water Productivity Analysis: Rainfed Season 2020-2021. FutureWater Report 227X

    Water Productivity Analysis: Rainfed Season 2020-2021

    Van Opstal, J.D., M. de Klerk, V.R. Hollander, J.E. Beard

  • 2021 - Technical reportVan Opstal, J., K. van Krieken, M. de Klerk, W. Beekman. 2021. Interventions Impact Analysis: Irrigation Season 2020. Technical report.X

    Interventions Impact Analysis: Irrigation Season 2020

    Van Opstal, J., K. van Krieken, M. de Klerk, W. Beekman

  • 2021 - FutureWater Report 218Van Opstal, J.D., M. de Klerk, A. Kaune, C. Nolet, J.E. Beard. 2021. Water Productivity Analysis: Irrigation Season 2020 (in Portuguese). FutureWater Report 218.X

    Water Productivity Analysis: Irrigation Season 2020 (in Portuguese)

    Van Opstal, J.D., M. de Klerk, A. Kaune, C. Nolet, J.E. Beard

  • 2021 - FutureWater Report 218Van Opstal, J.D., M. de Klerk, A. Kaune, C. Nolet, J.E. Beard. 2021. Water Productivity Analysis: Irrigation Season 2020. FutureWater Report 218.X

    Water Productivity Analysis: Irrigation Season 2020

    Van Opstal, J.D., M. de Klerk, A. Kaune, C. Nolet, J.E. Beard

  • 2020 - Quarterly ReportDomingos, C., A. Texeira, N. Schepers, K. van Krieken, M. de Klerk, J. van Opstal. 2020. APSAN-Vale Quarterly Progress Report Q4-2020.X

    APSAN-Vale Quarterly Progress Report Q4-2020

    Domingos, C., A. Texeira, N. Schepers, K. van Krieken, M. de Klerk, J. van Opstal

  • 2020 - FutureWater Report 214Van Opstal, J., J. Beard, M. de Klerk, 2020. Analysis of the Agricultural Crop Productivity Using Flying Sensors. Technical report - Horticultural season 2020. FutureWater Report 214.X

    Analysis of the Agricultural Crop Productivity Using Flying Sensors: Horticultural season 2020

    Van Opstal, J., J. Beard, M. de Klerk

  • 2020 - Technical reportVan Opstal, J., M. de Klerk, K. van Krieken, D. Chale. 2020. Interventions Impact Analysis: Rainfed Season 2019-2020 (in Portuguese). Technical report.X

    Interventions Impact Analysis: Rainfed Season 2019-2020 (in Portuguese)

    Van Opstal, J., M. de Klerk, K. van Krieken, D. Chale

  • 2020 - Technical reportVan Opstal, J., M. de Klerk, K. van Krieken, D. Chale. 2020. Interventions Impact Analysis: Rainfed Season 2019-2020. Technical report.X

    Interventions Impact Analysis: Rainfed Season 2019-2020

    Van Opstal, J., M. de Klerk, K. van Krieken, D. Chale

  • 2020 - Quarterly ReportCome, E., A. Teixera, J.D. van Opstal, M. de Klerk, N. Schepers, K. van Krieken, D. Levelt. 2020. APSAN-Vale Quarterly Progress Report Q3-2020.X

    APSAN-Vale Quarterly Progress Report Q3-2020

    Come, E., A. Teixera, J.D. van Opstal, M. de Klerk, N. Schepers, K. van Krieken, D. Levelt

  • 2020 - InfographicVan Opstal, J., J. Beard, M. de Klerk, 2020. Analysis of the Agricultural Crop Productivity Using Flying Sensors - InfographicX

    Analysis of the Agricultural Crop Productivity Using Flying Sensors – Infographic

    Van Opstal, J., J. Beard, M. de Klerk

  • 2020 - FutureWater Report 203Van Opstal, J., J. Beard, M. de Klerk, 2020. Analysis of the Agricultural Crop Productivity Using Flying Sensors. Technical report - Rainy season 2019-2020. FutureWater Report 203.X

    Analysis of the Agricultural Crop Productivity Using Flying Sensors: Rainy season 2019-2020

    Van Opstal, J., J. Beard, M. de Klerk

  • 2020 - FutureWater Report 204Van Opstal, J.D., M. de Klerk, A. Kaune, C. Nolet, J.E. Beard. 2020. Water Productivity Analysis: Rainfed Season 2019-2020. FutureWater Report 204.X

    Water Productivity Analysis: Rainfed Season 2019-2020

    Van Opstal, J.D., M. de Klerk, A. Kaune, C. Nolet, J.E. Beard

  • 2020 - Quarterly ReportCome, E., A. Teixera, J.D. van Opstal, M. de Klerk, N. Schepers, K. van Krieken, D. Levelt. 2020. APSAN-Vale Quarterly Progress Report Q2-2020.X

    APSAN-Vale Quarterly Progress Report Q2-2020

    Come, E., A. Teixera, J.D. van Opstal, M. de Klerk, N. Schepers, K. van Krieken, D. Levelt

  • 2020 - FutureWater Report 201Van Opstal, J.D., M. de Klerk, A. Kaune. 2020. Water Productivity Analysis: Irrigation Season 2019. FutureWater Report 201.X

    Water Productivity Analysis: Irrigation Season 2019

    Van Opstal, J.D., M. de Klerk, A. Kaune

  • 2020 - Quarterly ReportCome, E., A. Teixera, J.D. van Opstal, M. de Klerk, N. Schepers, K. van Krieken, D. Levelt. 2020. APSAN-Vale Quarterly Progress Report Q1-2020.X

    APSAN-Vale Quarterly Progress Report Q1-2020

    Come, E., A. Teixera, J.D. van Opstal, M. de Klerk, N. Schepers, K. van Krieken, D. Levelt

  • 2020 - Annual ReportCome, E., A. Teixera, J.D. van Opstal, M. de Klerk, N. Schepers, K. van Krieken, D. Levelt. 2020. APSAN-Vale Annual Progress Report 2019 (in Portuguese).X

    APSAN-Vale Annual Progress Report 2019 (in Portuguese)

    Come, E., A. Teixera, J.D. van Opstal, M. de Klerk, N. Schepers, K. van Krieken, D. Levelt

  • 2020 - Annual ReportCome, E., A. Teixera, J.D. van Opstal, M. de Klerk, N. Schepers, K. van Krieken, D. Levelt. 2020. APSAN-Vale Annual Progress Report 2019.X

    APSAN-Vale Annual Progress Report 2019

    Come, E., A. Teixera, J.D. van Opstal, M. de Klerk, N. Schepers, K. van Krieken, D. Levelt

  • 2019 - FutureWater Report 192De Klerk, M., J. van Til, F.K. Julius. 2019. ThirdEye Kenya: Flying Sensors to Support Farmers’ Decision Making - Final Report. FutureWater Report 192X

    ThirdEye Kenya: Flying Sensors to Support Farmers’ Decision Making – Final Report

    De Klerk, M., J. van Til, F.K. Julius

  • 2019 - FutureWater Report 190Van Opstal, J.D., M. de Klerk. 2019. ThirdEye Kenya – Water Productivity Report. FutureWater Report 190X

    ThirdEye Kenya – Water Productivity Report

    Van Opstal, J.D., M. de Klerk

  • 2019 - STOWA Report 2019-32Simons, G.W.H., M. de Klerk. 2019. Kennisbehoefte meteorologische en klimatologische informatie. STOWA Rapport 2019-32.X

    Kennisbehoefte meteorologische en klimatologische informatie

    Simons, G.W.H., M. de Klerk

  • 2018 - FutureWater ReportNolet, C., J. van Til, M. de Klerk. 2018. H2020 – TWIGA: WP3 Progress Report. FutureWater Report.X

    H2020 – TWIGA: WP3 Progress Report

    Nolet, C., J. van Til, M. de Klerk

  • 2018 - FutureWater ReportDe Klerk, M., J. van Til. 2018. ThirdEye Kenya: Flying Sensors to Support Farmers’ Decision Making - Summary of year 1 results. FutureWater Report.X

    ThirdEye Kenya: Flying Sensors to Support Farmers’ Decision Making – Summary of year 1 results

    De Klerk, M., J. van Til

  • 2018 - FutureWater ReportDe Klerk, M., J. van Til. 2018. ThirdEye Kenya: Flying Sensors to Support Farmers’ Decision Making - Interim Report. FutureWater Report.X

    ThirdEye Kenya: Flying Sensors to Support Farmers’ Decision Making – Interim Report

    De Klerk, M., J. van Til

  • 2018 - FutureWater ReportDe Klerk, M., J. van Til. 2018. ThirdEye Kenya: Flying Sensors to Support Farmers’ Decision Making - Inception Report. FutureWater Report.X

    ThirdEye Kenya: Flying Sensors to Support Farmers’ Decision Making – Inception Report

    De Klerk, M., J. van Til

  • 2017 - FutureWater Report 173De Klerk, M., P. Droogers. 2017. Earth by Night: Exploring Night Light Satellites Imagery for Water Management. FutureWater Report 173.X

    Earth by Night: Exploring Night Light Satellites Imagery for Water Management

    De Klerk, M., P. Droogers

  • 2017 - FutureWater Report 169Droogers, P., G.W.H. Simons, N.I. den Besten, J. van Til, M. de Klerk. 2017. Monitoring Water Productivity: Demonstration Case for ThirdEye Mozambique. FutureWater Report 169.X

    Monitoring Water Productivity: Demonstration Case for ThirdEye Mozambique

    Droogers, P., G.W.H. Simons, N.I. den Besten, J. van Til, M. de Klerk

  • 2017 - White paperSimons, G.W.H., A. Poortinga, W. Bastiaanssen, D. Saah, A. Troy, J.E. Hunink, M. de Klerk, M. Rutten, P. Cutter, L. Rebelo, L. Thanh Ha, V. Phuong Nam, T. Hessels, M. Fenn, B. Bean, D. Ganz, P. Droogers, T. Erickson, N. Clinton. 2017. On Spatially Distributed Hydrological Ecosystem Services - Bridging the Quantitative Information Gap using Remote Sensing and Hydrological Models. White paper published by FutureWater.X

    On Spatially Distributed Hydrological Ecosystem Services – Bridging the Quantitative Information Gap using Remote Sensing and Hydrological Models

    Simons, G.W.H., A. Poortinga, W.G.M. Bastiaanssen, D. Saah, A. Troy, J.E. Hunink, M. de Klerk, M. Rutten, P. Cutter, L. Rebelo, L. Thanh Ha, V. Phuong Nam, T. Hessels, M. Fenn, B. Bean, D. Ganz, P. Droogers, T. Erickson, N. Clinton

  • 2017 - FutureWater Report 168Hunink, J.E., M. de Klerk, F. de Boer, P. Droogers. 2017. Effectiveness of Improved Watershed Activities in Mbé River, Gabon. FutureWater Report 168.X

    Effectiveness of Improved Watershed Activities in Mbé River, Gabon

    Hunink, J.E., M. de Klerk, F. de Boer, P. Droogers

  • 2017 - FutureWater Report 166De Klerk, M., P. Droogers, G.W.H. Simons, J. van Til. 2017. Change in Water Productivity as a Result of ThirdEye Services in Mozambique. FutureWater Report 166.X

    Change in Water Productivity as a Result of ThirdEye Services in Mozambique

    De Klerk, M., P. Droogers, G.W.H. Simons, J. van Til

  • 2017 - FutureWater Report 163De Boer, F.S., M. de Klerk, G. Simons, P. Droogers. 2017. Pilot optimalisatie waterverdeling Hunze en Aa’s. FutureWater Report 163.X

    Pilot optimalisatie waterverdeling Hunze en Aa’s

    De Boer, F.S., M. de Klerk, G. Simons, P. Droogers

  • 2016 - FutureWater Report 155De Klerk, M., J. van Til, P. Droogers. 2016. Inception Report - Flying Sensors for Ultra-High Resolution Flood Risk Identification at Local Scales. FutureWater Report 155X

    Flying Sensors for Ultra-High Resolution Flood Risk Identification at Local Scales – Inception Report

    De Klerk, M., J. van Til, P. Droogers

  • 2016 - FutureWater Report 151De Klerk, M., P. Droogers. 2016. Flying Sensors informatie voor een duurzamere water en energie economie. FutureWater Report 151.X

    Flying Sensors informatie voor een duurzamere water en energie economie

    De Klerk, M., P. Droogers

  • 2015 - Deltares ReportDelsman, J., J.M. de Paz, M. de Klerk, L. Stuyt, P. de Louw, F. Visconti, M. del Longo, S. Pecora. 2015. Application of the FWOO method in the Vega Baja Segura catchment - Potential for local solutions to optimize fresh water supply in European regions under increasing water stress. Deltares Report. Reference 1220325-000-BGS-0001.X

    Application of the FWOO method in the Vega Baja Segura catchment

    Delsman, J., J.M. de Paz, M. de Klerk, L. Stuyt, P. de Louw, F. Visconti, M. del Longo, S. Pecora

  • 2015 - FutureWater Report 140Droogers, P., F.S. de Boer, M. de Klerk, G.W.H. Simons. 2015. Water Resources Model for Kenneti Basin South-Sudan. FutureWater Report 140X

    Water Resources Model for Kenneti Basin South-Sudan

    Droogers, P., F.S. de Boer, M. de Klerk, G.W.H. Simons

  • 2015 - FutureWater Report 139De Klerk, M., P. Droogers. 2015. Water Allocation Planning for Vega Baja del Segura Spain. FutureWater Report 139X

    Water Allocation Planning for Vega Baja del Segura Spain

    De Klerk, M., P. Droogers