松辽平原西部地表土壤水分时空变化与影响因素分析

发布时间：2018-06-10 15:26

本文选题：土壤水分 + SMOS数据　；参考：《东北师大学报(自然科学版)》2017年04期

【摘要】：基于土壤湿度和海洋盐度卫星(SMOS)土壤水分数据,采用时空均方根误差、趋势分析、重心迁移模型和相关分析方法,分析了松辽平原西部2010—2014年生长季地表土壤水分时空变化特征及影响因素.结果表明:研究区地表土壤水分呈东北高、西南低的空间分布格局,5年间平均地表土壤水分含量从0.110m~3/m~3增加到0.120m~3/m~3.扶余、大安、通辽、奈曼旗等地表层土壤水分空间变化显著.在不同年份,地表土壤水分随季节变化明显的地区不同.土壤水分重心向东北方向移动,迁移距离达30.809km.降水、植被覆盖因素均与地表土壤水分呈显著正相关,降水影响更强.在海拔小于200m或坡度为10°~20°的地区地表土壤水分相对较高,平均值分别为0.140,0.116m~3/m~3.黑土表层平均土壤水分更高,且具有明显的增长趋势.
[Abstract]:Based on soil moisture and marine salinity satellite (SMOS) soil moisture data, space-time root mean square error, trend analysis, barycenter migration model and correlation analysis methods are used. The temporal and spatial variation characteristics and influencing factors of surface soil moisture in the west of Songliao Plain from 2010 to 2014 were analyzed. The results showed that the average surface soil moisture content increased from 0.110m~3/m~3 to 0.120 mc3 / mc3 in 5 years. The spatial distribution pattern of surface soil moisture in the study area was high in the northeast and low in the southwest. In Fuyu, Da'an, Tongliao and Naiman Banner, the spatial change of surface soil moisture was remarkable. In different years, the area where the surface soil moisture changes obviously with the season is different. The center of gravity of soil moisture moved to the northeast with a migration distance of 30.809 km. The factors of precipitation and vegetation cover were significantly positively correlated with soil moisture, and the effect of precipitation was stronger. The surface soil moisture is relatively high in the area with elevation less than 200 m or slope of 10 掳~ 20 掳, with an average value of 0.140 ~ 0.116 mg / m ~ (3) / m ~ (3), respectively. The average soil moisture of black soil is higher and has obvious increasing trend.
【作者单位】：东北师范大学地理科学学院;
【基金】：国家自然科学基金资助项目(41571405;41671379)
【分类号】：S152.7

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