资源科学 ›› 2017, Vol. 39 ›› Issue (5): 860-870.doi: 10.18402/resci.2017.05.06
收稿日期:
2016-10-24
修回日期:
2017-02-05
出版日期:
2017-05-20
发布日期:
2017-05-20
作者简介:
作者简介:刘宇,男,贵州盘县人,博士,研究方向为景观格局与生态过程、生态系统评估。E-mail:
基金资助:
Received:
2016-10-24
Revised:
2017-02-05
Online:
2017-05-20
Published:
2017-05-20
摘要:
土壤侵蚀是陆地生态系统中广泛存在的地表过程,具有当地和异地两方面的生态环境和社会经济影响。土壤保持为人类社会提供防止土壤肥力下降和减少库塘淤积等效益。当前对异地土壤保持效益的计算大多基于当地土壤保持量、采用单一的泥沙输移比,忽视了泥沙输移比的尺度效应及其与流域特征和降雨等因素的时空变异相关的事实,缺乏对土壤保持效益空间传输的定量和显式表达。本文基于WATEM/SEDEM模型框架,通过流域侵蚀产沙和泥沙传输模拟,建立了评估当地和异地土壤保持效益的方法,量化了碾庄沟流域不同土地利用类型区土壤保持效益的输入和输出及其空间格局。该方法能识别土壤保持效益净供给区和净受益区,可建立起供给区和受益区之间定量化、空间直观的土壤保持效益传输联系,可为实施空间位置明确的生态补偿决策服务。
刘宇, 滕佳昆. WATEM/SEDEM框架下的土壤保持效益传输研究[J]. 资源科学, 2017, 39(5): 860-870.
Yu LIU, Jiakun TENG. Assessing the delivery of soil erosion control benefits at the watershed level following the WATEM/SEDEM concept[J]. Resources Science, 2017, 39(5): 860-870.
表 3
土地利用分类精度评价"
坝地 | 坡耕地 | 梯田 | 果园 | 森林 | 灌丛 | 草地 | 库塘 | 河流 | 建设用地 | 裸土 | 用户精度 | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
坝地 | 20 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 100.00 |
坡耕地 | 0 | 10 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 83.33 |
梯田 | 0 | 1 | 24 | 1 | 0 | 0 | 4 | 0 | 0 | 1 | 0 | 77.42 |
果园 | 0 | 0 | 0 | 11 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 91.67 |
森林 | 0 | 0 | 0 | 0 | 25 | 3 | 0 | 0 | 0 | 2 | 0 | 83.33 |
灌丛 | 0 | 0 | 0 | 0 | 2 | 17 | 0 | 0 | 0 | 0 | 0 | 89.47 |
草地 | 0 | 0 | 1 | 0 | 1 | 0 | 20 | 0 | 0 | 1 | 0 | 86.96 |
库塘 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 16 | 0 | 0 | 0 | 94.12 |
河流 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8 | 0 | 0 | 100.00 |
建设用地 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 79 | 5 | 91.86 |
裸土 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5 | 9 | 64.29 |
生产者精度/% | 90.91 | 83.33 | 92.31 | 91.67 | 86.21 | 85.00 | 83.33 | 100.00 | 100.00 | 88.76 | 64.29 |
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