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Rainfall water collection and irrigation via stone bud and karren on karst rocky desertification slopes: Application and benefit analysis

Author

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  • Zhou, Baichi
  • Yang, Shengtian
  • Lou, Hezhen
  • Gong, Jiyi
  • Pan, Zihao
  • Wang, Huaixing
  • Yi, Yin
  • Gao, Chengcheng
  • Huang, Xueyong
  • Wu, Weizhao

Abstract

Lack of surface water is a key factor leading to agricultural drought in karst regions and exacerbates the karst rocky desertification, which is characterized by high rate of exposed bedrock. With the characteristics of impermeability, runoff collection, and wide distribution, stone bud and karren (SBK), a unique karst landscape type composed of exposed bedrock and gullies, has a great potential to solve water shortage in agricultural irrigation, especially in the rain-rich karst regions of Guizhou Province, China. Using unmanned aerial vehicle images to identify SBK and measured rainfall–runoff data for validation, we applied SBK as a basic unit to harvest rainfall water on rocky desertification slopes and analyzed the benefits of rainfall water collection and irrigation via SBK. The results showed the following: (1) Karrens on rocky desertification slopes could be identified using a method coupling terrain opening difference and depression filling, and the simulated runoff on SBK could achieved the average NSE and R2 of 0.82 and 0.86, with RMSE and RSR less than 0.03 m3 and 0.51, respectively. (2) The exposed bedrock utilization rate and rainfall water collection coefficient of SBK were 0.62 and 0.55, respectively, such that the area ratio of exposed bedrock to the cultivated land meeting irrigation water demand reached 1:3.1, 1:3.7 and 1:7.0 under 90 %, 80 % and 50 % possibilities of irrigation. (3) Implementing SBK for rainfall water harvesting and irrigation could efficiently avoid crop failure in the karst regions where crops faced drought within only one week after rainfall, and was at an affordable cost to local farmers with limited environmental damage. The use of SBK to harvest rainfall water could also alleviate surface water shortages in karst regions caused by problems such as uneven temporal distribution of rainfall and engineering water shortages. Consequently, SBK demonstrate a strong application potential to alleviate agricultural drought in karst rocky desertification regions.

Suggested Citation

  • Zhou, Baichi & Yang, Shengtian & Lou, Hezhen & Gong, Jiyi & Pan, Zihao & Wang, Huaixing & Yi, Yin & Gao, Chengcheng & Huang, Xueyong & Wu, Weizhao, 2024. "Rainfall water collection and irrigation via stone bud and karren on karst rocky desertification slopes: Application and benefit analysis," Agricultural Water Management, Elsevier, vol. 304(C).
    • Handle: RePEc:eee:agiwat:v:304:y:2024:i:c:s0378377424004232
    DOI: 10.1016/j.agwat.2024.109087
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    References listed on IDEAS

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    1. Zihan Jiang & Hongyan Liu & Hongya Wang & Jian Peng & Jeroen Meersmans & Sophie M. Green & Timothy A. Quine & Xiuchen Wu & Zhaoliang Song, 2020. "Bedrock geochemistry influences vegetation growth by regulating the regolith water holding capacity," Nature Communications, Nature, vol. 11(1), pages 1-9, December.
    2. Dariusz Gąsiorowski & Romuald Szymkiewicz, 2022. "Inverse Flood Routing Using Simplified Flow Equations," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 36(11), pages 4115-4135, September.
    3. Qin, Luoyi & Bai, Xiaoyong & Wang, Shijie & Zhou, Dequan & Li, Yue & Peng, Tao & Tian, Yichao & Luo, Guangjie, 2015. "Major problems and solutions on surface water resource utilisation in karst mountainous areas," Agricultural Water Management, Elsevier, vol. 159(C), pages 55-65.
    4. Stella Margiorou & Aristeidis Kastridis & Marios Sapountzis, 2022. "Pre/Post-Fire Soil Erosion and Evaluation of Check-Dams Effectiveness in Mediterranean Suburban Catchments Based on Field Measurements and Modeling," Land, MDPI, vol. 11(10), pages 1-18, October.
    5. Weijie Gao & Siyi Zhou & Xiaojie Yin, 2024. "Spatio-Temporal Evolution Characteristics and Driving Factors of Typical Karst Rocky Desertification Area in the Upper Yangtze River," Sustainability, MDPI, vol. 16(7), pages 1-17, March.
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