福建农林大学学报（自然科学版）2017，Vol.46Issue(3)：329-335,7.DOI:10.13323/j.cnki.j.fafu(nat.sci.).2017.03.016
南方红壤丘陵区流域景观格局与水土流失的关系
The relationship between landscape pattern and water and soil erosion in hilly red soil region in South China
摘要
Abstract
To prevent and control water and soil erosion in hilly red soil region of South China, landscape pattern indexes dominantly influencing erosion area were extracted by analyzing DEM datasets of Anxi County, then a nonlinear mapping relation between land-scape pattern indexes and erosion area was established by back propagation(BP) model. Finally, new erosion area was simulated by the model with adjusted landscape pattern indexes. The results showed that soil and water erosion mainly occurred at tea plantation and bare field in Xixi River Basin. Indexes including class area ( CA) , number of patches, area-weighted mean shape index and patch fractal dimension were positively correlated with erosion area while landscape connectivity was negatively correlated. The abso-lute value of relative error of mapping relation between erosion area and landscape pattern was less than 5%, indicating a high preci-sion of the BP model. The stimulated erosion area was dropped by 14.14% with adjusted LSI of tea plantation and CA of bare field. To summarize, BP model based on landscape pattern indexes was applicable to indicate and control erosion in hilly red soil region of South China.关键词
景观格局指数/水土流失/BP神经网络/南方红壤丘陵区Key words
landscape pattern index/water and soil erosion/back propagation neural network/hilly red soil region in South China分类
农业科技引用本文复制引用
杨秋华,黄炎和,范胜龙,林金石,季翔..南方红壤丘陵区流域景观格局与水土流失的关系[J].福建农林大学学报（自然科学版）,2017,46(3):329-335,7.基金项目
国家自然科学基金(41601557) （41601557）
国家科技支撑计划项目(2014BAD15B0303) （2014BAD15B0303）
福建省教育厅社科项目(JAS160171). （JAS160171）
