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Spatially Explicit Reconstruction of Cropland Using the Random Forest: A Case Study of the Tuojiang River Basin, China from 1911 to 2010

Author

Listed:
  • Qi Wang

    (College of Resources, Sichuan Agricultural University, Chengdu 611130, China)

  • Min Xiong

    (College of Resources, Sichuan Agricultural University, Chengdu 611130, China)

  • Qiquan Li

    (College of Resources, Sichuan Agricultural University, Chengdu 611130, China)

  • Hao Li

    (College of Resources, Sichuan Agricultural University, Chengdu 611130, China)

  • Ting Lan

    (College of Resources, Sichuan Agricultural University, Chengdu 611130, China)

  • Ouping Deng

    (College of Resources, Sichuan Agricultural University, Chengdu 611130, China)

  • Rong Huang

    (College of Resources, Sichuan Agricultural University, Chengdu 611130, China)

  • Min Zeng

    (College of Resources, Sichuan Agricultural University, Chengdu 611130, China)

  • Xuesong Gao

    (College of Resources, Sichuan Agricultural University, Chengdu 611130, China)

Abstract

A long-term, high-resolution cropland dataset plays an essential part in accurately and systematically understanding the mechanisms that drive cropland change and its effect on biogeochemical processes. However, current widely used spatially explicit cropland databases are developed according to a simple downscaling model and are associated with low resolution. By combining historical county-level cropland archive data with natural and anthropogenic variables, we developed a random forest model to spatialize the cropland distribution in the Tuojiang River Basin (TRB) during 1911–2010, using a resolution of 30 m. The reconstruction results showed that the cropland in the TRB increased from 1.13 × 10 4 km 2 in 1911 to 1.81 × 10 4 km 2 . In comparison with satellite-based data for 1980, the reconstructed dataset approximated the remotely sensed cropland distribution. Our cropland map could capture cropland distribution details better than three widely used public cropland datasets, due to its high spatial heterogeneity and improved spatial resolution. The most critical factors driving the distribution of TRB cropland include nearby-cropland, elevation, and climatic conditions. This newly reconstructed cropland dataset can be used for long-term, accurate regional ecological simulation, and future policymaking. This novel reconstruction approach has the potential to be applied to other land use and cover types via its flexible framework and modifiable parameters.

Suggested Citation

  • Qi Wang & Min Xiong & Qiquan Li & Hao Li & Ting Lan & Ouping Deng & Rong Huang & Min Zeng & Xuesong Gao, 2021. "Spatially Explicit Reconstruction of Cropland Using the Random Forest: A Case Study of the Tuojiang River Basin, China from 1911 to 2010," Land, MDPI, vol. 10(12), pages 1-18, December.
    • Handle: RePEc:gam:jlands:v:10:y:2021:i:12:p:1338-:d:695289
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    References listed on IDEAS

    as
    1. Xin, Liangjie & Li, Xiubin, 2018. "China should not massively reclaim new farmland," Land Use Policy, Elsevier, vol. 72(C), pages 12-15.
    2. Florian Zabel & Ruth Delzeit & Julia M. Schneider & Ralf Seppelt & Wolfram Mauser & Tomáš Václavík, 2019. "Global impacts of future cropland expansion and intensification on agricultural markets and biodiversity," Nature Communications, Nature, vol. 10(1), pages 1-10, December.
    3. Sebastien Gervois & Philippe Ciais & Nathalie de Noblet-Ducoudre & Nadine Brisson & Nicolas Vuichard & Nicolas Viovy, 2008. "Carbon and water balance of European croplands throughout the 20th century," Post-Print hal-00716545, HAL.
    4. Tian, Guangjin & Duan, Jinlong & Yang, Lan, 2021. "Spatio-temporal pattern and driving mechanisms of cropland circulation in China," Land Use Policy, Elsevier, vol. 100(C).
    Full references (including those not matched with items on IDEAS)

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