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Erosion Risk

พิมพ์โดย: Open Development Mekong

This dataset shows the risk of erosion around within the Greater Mekong Region, from low to high. Erosion and sedimentation by water involves the process of detachment, transport, and deposition of soil particles, driven by forces from raindrops and water flowing over the land surface. Because soil erosion is difficult to measure at large scales, soil erosion models are crucial estimation tools to extrapolate limited data to other localities and conditions. The Revised Universal Soil Loss Equation (RUSLE), which predicts annual soil loss from rainfall and runoff, is the most common model used at large spatial scales due to its relatively simple structure and empirical basis. The model takes into account rainfall erosivity, topography, soil erodibility, land cover and management, and conservation practices. Because the RUSLE model was developed based on agricultural plot scale and parameterized for environmental conditions in the USA, modifications of the methods and data inputs are necessary to make the equation applicable to the globe. We estimated erosion potential based on the RUSLE model, adjusted to extend its applicability to a global scale. Conservation practices and topography information were not included in this model to calculate global erosion potential, due to data limitation and their relatively minor contribution to the variation in soil erosion at the continental to global scale compared to other factors. The result of the global model was categorized into five quantiles, corresponding to low to high erosion risks.

ทรัพยากรข้อมูล (4)

ตัวอย่างทรัพยากรข้อมูล - Erosion Risk

ข้อมูลเพิ่มเติม

ฟิลด์ ค่า
หมวดหมู่หัวข้อของชุดข้อมูล
  • Environment and natural resources
  • Soil management
  • Water resources
ภาษา
  • ภาษาอังกฤษ
ข้อจำกัดการใช้งาน The access and use constraints for this dataset are restricted by the Global Forest Water whose terms and conditions can be found here: http://www.globalforestwatch.org/terms.
วันที่ชุดข้อมูล 1 กันยายน ค.ศ. 2015
ชื่อทางภูมิศาสตร์
  • กัมพูชา
  • เวียดนาม
  • ลาว
  • ไทย
  • พม่า
  • จีน
ความแม่นยำเชิงตำแหน่ง The RUSLE model was originally developed to be applicable on the agriculture plot scale and was parameterized for environmental conditions of the USA. The application of the model at a global scale may contain uncertainly and overestimation compared to available observed data, especially for tropical regions, polar climate zones, and high mountainous regions. Adjustments to the model have improved its global applicability, especially for mountainous regions, but does not eliminate bias and uncertainty of the model. The accuracy of this layer has not been assessed. The model does not account for sediment deposition or sediment transport.
ความสอดคล้องเชิงตรรกะ There are no know issues with logical consistency
ความสมบูรณ์ There are no known issues with completeness.
ขั้นตอนของกระบวนการ The dataset was obtained from the Global Forest Watch Water site and clipped to the bounding box of the region.
แหล่งที่มา World Resources Institute. "Erosion." Accessed through Global Forest Watch Water on [05/09/16]. water.globalforestwatch.org
ฝ่ายงานรับผิดชอบ Global Forest Watch 10 G Street NE Suite 800, Washington, DC 20002, USA Phone +1 (202) 729-7600 Fax: +1 (202) 720 7610
สัญญาอนุญาต unspecified
ลิขสิทธิ์ Yes
เวอร์ชัน 1.0
วันที่อัพโหลด กันยายน 28, 2016, 07:58 (UTC)
แก้ไขเมื่อ ธันวาคม 30, 2016, 03:33 (UTC)