Cao Wenhong, Ning Duihu, Qin Wei. Soil and Water Conservation Rate: Connotation of Concept, Threshold Determination and Practical Application[J]. Bulletin of Soiland Water Conservation, 2023, 43(1): 409-416.
DOI:
Cao Wenhong, Ning Duihu, Qin Wei. Soil and Water Conservation Rate: Connotation of Concept, Threshold Determination and Practical Application[J]. Bulletin of Soiland Water Conservation, 2023, 43(1): 409-416. DOI: 10.13961/j.cnki.stbctb.2023.01.046.
Soil and Water Conservation Rate: Connotation of Concept, Threshold Determination and Practical Application
[Objective] The suitable targets for soil and water loss prevention and control in different provinces and all of China were determined in order to help people of all sectors of society in understanding and applying the concept of soil and water conservation rate (SWCR) and related research
thereby providing a useful reference for facilitating the high quality development of soil and water conservation in the new age. [Methods] Based on the concept and related research results of SWCR as first presented by the Ministry of Water Resources in 2019
the concept of SWCR was expounded and the threshold of SWCR was determined. A grid of 30 m resolution was used as the spatial unit
and the multi-source geospatial data (including classification and grading of soil erosion
land use
topography
vegetation cover
etc.) were used to calculate and analyze the thresholds of SWCR in China and different provinces
and to explain the application of serial targets for SWCR in the liability assessment and implementation of targets for soil and water conservation in China. [Results] The core connotation of concept for SWCR represents the appropriate degree of soil erosion control that conforms to the natural law and meets the requirements of economic and social development. In the future
SWCR will become the multi-dimensional threshold system that includes reducting area and downgrading intensity of soil and water loss
and enhancing function of soil and water conservation. It could be used to comprehensively evaluate the current situation of regional soil and water loss control
and their appropriate degree could be achieved. At present
SWCR mainly reflects the appropriate goal of reducing the area of soil and water loss
which has been employed in the assessment of “Beautiful China Construction”
and which has become the core indicator in Opinions on Strengthening Soil and Water Conservation in the New Age that was printed and distributed by the General Office of the CPC Central Committee and the General Office of the State Council. [Conclusion] Based on the social ecosystem paradigm
it is suggested to study the threshold value and assessment methods of the change of soil and water loss in different regions at different levels based on comprehensive consideration of the influence of natural and social factors
the synergy of different local and spillover effects
and the balance of multiple objectives at ecological and economic levels. At the same time
focusing on the relevant requirements of the comprehensive management of the basin system
we should pay attention to the appropriate scale and reasonable layout of the main control measures or key objects
Feng Xiaoming, Fu Bojie, Piao Shilong, et al. Revegetation in China’s Loess Plateau is approaching sustainable water resource limits [J]. Nature Climate Change, 2016(6):1019-1022.
Ouyang Zhiyun, Zheng Hua, Xiao Yi, et al. Improvements in ecosystem services from investments in natural capital [J]. Science, 2016,352:1455-1459.
Wu Xutong, Wei Yongping, Fu Bojie, et al. Evolution and effects of the social-ecological system over a millennium in China’s Loess Plateau [J]. Science Advances, 2020(6):eabc0276.
Wei Jie, Zhou Jie, Tian Junliang, et al. Decoupling soil erosion and human activities on the Chinese Loess Plateau in the 20th Century [J]. Catena, 2006,68(1):10-15.
Wolters Michel L, Sun Zhongchang, Huang Chong, et al. Environmental awareness and vulnerability in the Yellow River Delta: Results based on a comprehensive household survey [J]. Ocean and Coastal Management, 2016(120):1-10.