發(fā)布時間：2018-06-05 12:48

  本文選題：土地利用變化 + 土地轉(zhuǎn)移流��； 參考：《西北師范大學學報(自然科學版)》2017年04期

【摘要】：基于土地轉(zhuǎn)移流視角,提出土地轉(zhuǎn)移率和土地轉(zhuǎn)移鏈概念,采用Landsat MSS/TM/ETM遙感影像數(shù)據(jù)源,對寧夏中部干旱帶鹽池縣的土地變化過程進行追蹤分析.結(jié)果表明,1978—2015年鹽池縣土地利用變化總體表現(xiàn)為耕地和草地比例增大,未利用地減少.區(qū)縣尺度上,土地轉(zhuǎn)移率先增后減.類型上,耕地轉(zhuǎn)移率為降—升—降態(tài)勢,草地轉(zhuǎn)移率持續(xù)降低,未利用地轉(zhuǎn)移率呈升—降—平穩(wěn)態(tài)勢.1978—1987年,以未利用地—耕地流、草地—耕地流為主;1987—1996年,土地利用轉(zhuǎn)移流呈現(xiàn)多元化特征;1996年后加強了生態(tài)退耕和對未利用地的改造利用.1978—2015年,土地轉(zhuǎn)移鏈圍繞著耕地的流失與保護進行,單向鏈主要是63型(未利用地—草地型);往復鏈以Ⅱa型為主,為363型(草地—未利用地—草地型)、313型(草地—耕地—草地型)和131型(耕地—草地—耕地型);復雜鏈主要是163型(耕地—未利用地—草地型).
[Abstract]:Based on the view of land transfer flow, the concepts of land transfer rate and land transfer chain are put forward, and Landsat MSS / TM / ETM remote sensing image data source is used to track and analyze the land change process in Yanchi County in the arid zone of Ningxia. The results showed that the change of land use in Yanchi County from 1978 to 2015 showed that the proportion of cultivated land and grassland increased and the unused land decreased. District and county scale, land transfer first increase and then decrease. On the type, the rate of cultivated land transfer is decreasing, the rate of grassland transfer continues to decrease, and the rate of unused land transfer is ascending-descending-steady. 1978-1987, with unused land-cultivated land flow and grassland-cultivated land flow mainly from 1987 to 1996. The flow of land use transfer has diversified characteristics; after 1996, the ecological conversion of farmland and the transformation and utilization of unused land were strengthened, and the land transfer chain revolved around the loss and protection of cultivated land. The unidirectional chain is mainly type 63 (unused land and grassland type), and the reciprocating chain is mainly type 鈪，

本文編號：1982043