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
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HiFarm: Data Driven Agricultural Intensification Pilot Program for Maize, Coffee and Tea Farmers in Kenya
The eco.business Fund, in partnership with FutureWater and Export Trading Group (ETG), one of the largest integrated agricultural supply chain managers and processors in sub-Saharan Africa, has launched a pilot project in Kenya for data-driven agricultural intensification. This project aims to improve farmer productivity and profitability whilst enhancing the environmental…
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Tailor-made Advice and Training on Flying Sensors for Agriculture in Jordan
This online training was provided over a period of 8 weeks for 25 participants selected by NARC (National Agricultural Research Centre) Jordan. The online training consisted of self-paced exercises and regular live (video) sessions provided through the OpenCourseWare website of IHE Delft. The four modules provided in this training will…
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Tailor-Made Training on Crop Models and Remote Sensing for Water Management in Agricultural Systems
FutureWater, HiView and ThirdEye Kenya have partnered with Egerton University (Crops, Horticulture & Soils Department) to conduct a tailor-made training on 'Crop models and remote sensing for water management in agricultural systems'. This training project is funded by the NUFFIC - TMT program.
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Mavo Diami: Services on Land-crop Suitability Mapping and Operational Irrigation Advice in Angola
The overall project goal is to improve sustainable food and income security for >100,000 smallholder farmers in Angola, by accelerating their agri-business performance through informed decisions supported by the Mavo Diami services built on weather, soil and crop signals and other relevant data and indicators. Ensuring the services are offered…
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APSAN-Vale: Piloting Innovations to Increase Water Productivity and Food Security in Mozambique
The project has as its overall aim to increase climate resilient agricultural productivity and food security, with a specific objective to increase the water productivity and profitability of smallholder farmers in Mozambique, prioritizing small (family sector) farmers to increase food and nutritional security. This project will demonstrate what the best…
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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…
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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…
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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…
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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…
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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
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2022 - Infographic
Van 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
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2022 - Infographic
Van Opstal, J.D., M. de Klerk, 2022. APSAN-Vale Water Productivity Analysis: Irrigation Season 2021 (in Portuguese). Infographic.XAPSAN-Vale Water Productivity Analysis: Irrigation Season 2021 (in Portuguese)
Van Opstal, J.D., M. de Klerk
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2022 - FutureWater Report 236
Van Opstal, J.D., M. de Klerk, V.R. Hollander. 2022. APSAN-Vale Water Productivity Analysis: Irrigation Season 2021. FutureWater Report 236XAPSAN-Vale Water Productivity Analysis: Irrigation Season 2021
Van Opstal, J.D., M. de Klerk, V.R. Hollander
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2022 - FutureWater Report 236
Van Opstal, J.D., M. de Klerk, V.R. Hollander. 2022. APSAN-Vale Water Productivity Analysis: Irrigation Season 2021 (in Portuguese). FutureWater Report 236XAPSAN-Vale Water Productivity Analysis: Irrigation Season 2021 (in Portuguese)
Van Opstal, J.D., M. de Klerk, V.R. Hollander
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2021 - Technical report
Van Krieken, K., E. Memelink, M. de Klerk, J. van Opstal. 2021. Interventions Impact Analysis: Rainfed Season 2020-2021 (in Portuguese). Technical report.XInterventions Impact Analysis: Rainfed Season 2020-2021 (in Portuguese)
Van Krieken, K., E. Memelink, M. de Klerk, J. van Opstal
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2021 - Technical report
Van Krieken, K., E. Memelink, M. de Klerk, J. van Opstal. 2021. Interventions Impact Analysis: Rainfed Season 2020-2021. Technical report.XInterventions Impact Analysis: Rainfed Season 2020-2021
Van Krieken, K., E. Memelink, M. de Klerk, J. van Opstal
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2021 - FutureWater Report 227
Van 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 227XWater Productivity Analysis: Rainfed Season 2020-2021 (in Portuguese)
Van Opstal, J.D., M. de Klerk, V.R. Hollander, J.E. Beard
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2021 - FutureWater Report 227
Van Opstal, J.D., M. de Klerk, V.R. Hollander, J.E. Beard. 2021. Apsan Vale Water Productivity Analysis: Rainfed Season 2020-2021. FutureWater Report 227XWater Productivity Analysis: Rainfed Season 2020-2021
Van Opstal, J.D., M. de Klerk, V.R. Hollander, J.E. Beard
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2021 - Technical report
Van Opstal, J., K. van Krieken, M. de Klerk, W. Beekman. 2021. Interventions Impact Analysis: Irrigation Season 2020. Technical report.XInterventions Impact Analysis: Irrigation Season 2020
Van Opstal, J., K. van Krieken, M. de Klerk, W. Beekman
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2021 - FutureWater Report 218
Van 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.XWater Productivity Analysis: Irrigation Season 2020 (in Portuguese)
Van Opstal, J.D., M. de Klerk, A. Kaune, C. Nolet, J.E. Beard
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2021 - FutureWater Report 218
Van Opstal, J.D., M. de Klerk, A. Kaune, C. Nolet, J.E. Beard. 2021. Water Productivity Analysis: Irrigation Season 2020. FutureWater Report 218.XWater Productivity Analysis: Irrigation Season 2020
Van Opstal, J.D., M. de Klerk, A. Kaune, C. Nolet, J.E. Beard
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2020 - Quarterly Report
Domingos, 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
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2020 - FutureWater Report 214
Van 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.XAnalysis of the Agricultural Crop Productivity Using Flying Sensors: Horticultural season 2020
Van Opstal, J., J. Beard, M. de Klerk
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2020 - Technical report
Van Opstal, J., M. de Klerk, K. van Krieken, D. Chale. 2020. Interventions Impact Analysis: Rainfed Season 2019-2020 (in Portuguese). Technical report.XInterventions Impact Analysis: Rainfed Season 2019-2020 (in Portuguese)
Van Opstal, J., M. de Klerk, K. van Krieken, D. Chale
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2020 - Technical report
Van Opstal, J., M. de Klerk, K. van Krieken, D. Chale. 2020. Interventions Impact Analysis: Rainfed Season 2019-2020. Technical report.XInterventions Impact Analysis: Rainfed Season 2019-2020
Van Opstal, J., M. de Klerk, K. van Krieken, D. Chale
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2020 - Quarterly Report
Come, 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.XAPSAN-Vale Quarterly Progress Report Q3-2020
Come, E., A. Teixera, J.D. van Opstal, M. de Klerk, N. Schepers, K. van Krieken, D. Levelt
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2020 - Infographic
Van Opstal, J., J. Beard, M. de Klerk, 2020. Analysis of the Agricultural Crop Productivity Using Flying Sensors - InfographicXAnalysis of the Agricultural Crop Productivity Using Flying Sensors – Infographic
Van Opstal, J., J. Beard, M. de Klerk
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2020 - FutureWater Report 203
Van 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.XAnalysis of the Agricultural Crop Productivity Using Flying Sensors: Rainy season 2019-2020
Van Opstal, J., J. Beard, M. de Klerk
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2020 - FutureWater Report 204
Van Opstal, J.D., M. de Klerk, A. Kaune, C. Nolet, J.E. Beard. 2020. Water Productivity Analysis: Rainfed Season 2019-2020. FutureWater Report 204.XWater Productivity Analysis: Rainfed Season 2019-2020
Van Opstal, J.D., M. de Klerk, A. Kaune, C. Nolet, J.E. Beard
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2020 - Quarterly Report
Come, 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.XAPSAN-Vale Quarterly Progress Report Q2-2020
Come, E., A. Teixera, J.D. van Opstal, M. de Klerk, N. Schepers, K. van Krieken, D. Levelt
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2020 - FutureWater Report 201
Van Opstal, J.D., M. de Klerk, A. Kaune. 2020. Water Productivity Analysis: Irrigation Season 2019. FutureWater Report 201.XWater Productivity Analysis: Irrigation Season 2019
Van Opstal, J.D., M. de Klerk, A. Kaune
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2020 - Quarterly Report
Come, 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.XAPSAN-Vale Quarterly Progress Report Q1-2020
Come, E., A. Teixera, J.D. van Opstal, M. de Klerk, N. Schepers, K. van Krieken, D. Levelt
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2020 - Annual Report
Come, 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).XAPSAN-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
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2020 - Annual Report
Come, E., A. Teixera, J.D. van Opstal, M. de Klerk, N. Schepers, K. van Krieken, D. Levelt. 2020. APSAN-Vale Annual Progress Report 2019.XAPSAN-Vale Annual Progress Report 2019
Come, E., A. Teixera, J.D. van Opstal, M. de Klerk, N. Schepers, K. van Krieken, D. Levelt
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2019 - FutureWater Report 192
De Klerk, M., J. van Til, F.K. Julius. 2019. ThirdEye Kenya: Flying Sensors to Support Farmers’ Decision Making - Final Report. FutureWater Report 192XThirdEye Kenya: Flying Sensors to Support Farmers’ Decision Making – Final Report
De Klerk, M., J. van Til, F.K. Julius
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2019 - FutureWater Report 190
Van Opstal, J.D., M. de Klerk. 2019. ThirdEye Kenya – Water Productivity Report. FutureWater Report 190XThirdEye Kenya – Water Productivity Report
Van Opstal, J.D., M. de Klerk
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2019 - STOWA Report 2019-32
Simons, G.W.H., M. de Klerk. 2019. Kennisbehoefte meteorologische en klimatologische informatie. STOWA Rapport 2019-32.XKennisbehoefte meteorologische en klimatologische informatie
Simons, G.W.H., M. de Klerk
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2018 - FutureWater Report
Nolet, C., J. van Til, M. de Klerk. 2018. H2020 – TWIGA: WP3 Progress Report. FutureWater Report.XH2020 – TWIGA: WP3 Progress Report
Nolet, C., J. van Til, M. de Klerk
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2018 - FutureWater Report
De Klerk, M., J. van Til. 2018. ThirdEye Kenya: Flying Sensors to Support Farmers’ Decision Making - Summary of year 1 results. FutureWater Report.XThirdEye Kenya: Flying Sensors to Support Farmers’ Decision Making – Summary of year 1 results
De Klerk, M., J. van Til
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2018 - FutureWater Report
De Klerk, M., J. van Til. 2018. ThirdEye Kenya: Flying Sensors to Support Farmers’ Decision Making - Interim Report. FutureWater Report.XThirdEye Kenya: Flying Sensors to Support Farmers’ Decision Making – Interim Report
De Klerk, M., J. van Til
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2018 - FutureWater Report
De Klerk, M., J. van Til. 2018. ThirdEye Kenya: Flying Sensors to Support Farmers’ Decision Making - Inception Report. FutureWater Report.XThirdEye Kenya: Flying Sensors to Support Farmers’ Decision Making – Inception Report
De Klerk, M., J. van Til
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2017 - FutureWater Report 173
De Klerk, M., P. Droogers. 2017. Earth by Night: Exploring Night Light Satellites Imagery for Water Management. FutureWater Report 173.XEarth by Night: Exploring Night Light Satellites Imagery for Water Management
De Klerk, M., P. Droogers
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2017 - FutureWater Report 169
Droogers, 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.XMonitoring Water Productivity: Demonstration Case for ThirdEye Mozambique
Droogers, P., G.W.H. Simons, N.I. den Besten, J. van Til, M. de Klerk
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2017 - White paper
Simons, 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.XOn 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
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2017 - FutureWater Report 168
Hunink, J.E., M. de Klerk, F. de Boer, P. Droogers. 2017. Effectiveness of Improved Watershed Activities in Mbé River, Gabon. FutureWater Report 168.XEffectiveness of Improved Watershed Activities in Mbé River, Gabon
Hunink, J.E., M. de Klerk, F. de Boer, P. Droogers
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2017 - FutureWater Report 166
De 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.XChange in Water Productivity as a Result of ThirdEye Services in Mozambique
De Klerk, M., P. Droogers, G.W.H. Simons, J. van Til
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2017 - FutureWater Report 163
De Boer, F.S., M. de Klerk, G. Simons, P. Droogers. 2017. Pilot optimalisatie waterverdeling Hunze en Aa’s. FutureWater Report 163.XPilot optimalisatie waterverdeling Hunze en Aa’s
De Boer, F.S., M. de Klerk, G. Simons, P. Droogers
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2016 - FutureWater Report 155
De Klerk, M., J. van Til, P. Droogers. 2016. Inception Report - Flying Sensors for Ultra-High Resolution Flood Risk Identification at Local Scales. FutureWater Report 155XFlying Sensors for Ultra-High Resolution Flood Risk Identification at Local Scales – Inception Report
De Klerk, M., J. van Til, P. Droogers
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2016 - FutureWater Report 151
De Klerk, M., P. Droogers. 2016. Flying Sensors informatie voor een duurzamere water en energie economie. FutureWater Report 151.XFlying Sensors informatie voor een duurzamere water en energie economie
De Klerk, M., P. Droogers
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2015 - Deltares Report
Delsman, 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.XApplication 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
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2015 - FutureWater Report 140
Droogers, P., F.S. de Boer, M. de Klerk, G.W.H. Simons. 2015. Water Resources Model for Kenneti Basin South-Sudan. FutureWater Report 140XWater Resources Model for Kenneti Basin South-Sudan
Droogers, P., F.S. de Boer, M. de Klerk, G.W.H. Simons
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2015 - FutureWater Report 139
De Klerk, M., P. Droogers. 2015. Water Allocation Planning for Vega Baja del Segura Spain. FutureWater Report 139XWater Allocation Planning for Vega Baja del Segura Spain
De Klerk, M., P. Droogers
