论文部分内容阅读
以库车绿洲为例,探讨了星载雷达影像对表征土壤盐渍化微观离子的响应情况。选取春、秋两季的Radarsat影像数据,野外采集土壤剖面0—10cm和0—50cm处土样,室内测定其8大粒子含量(Na+,K+,Mg2+,Ca2+,Cl-,SO42-,HCO3--,CO32-)以及pH值、电导率、矿化度、含盐量。采用GPS定位技术,记录每一采样点位的经纬度坐标和雷达影像进行匹配,采用灰色关联分析法分析了RadarsatC波段HH极化对微观粒子在春、秋季节0—10cm和0—50cm土壤剖面的响应。结果表明,春季雷达影像对pH值响应强烈,对含盐量响应不稳定,对电导率、矿化度响应一般。就阳离子而言,对Ca2+响应最为显著;就阴离子而言,对HCO3-响应最为显著。10月份雷达影像对pH值、电导率响应强烈,对含盐量响应不稳定,对矿化度响应一般。就阳离子而言,无明显规律。就阴离子而言Cl-响应最为显著,SO24-,HCO3-无明显规律。
Taking Kucha Oasis as an example, the response of spaceborne radar images to the characterization of soil salinization micro-ions was discussed. Radarsat image data of spring and autumn were selected. Soil samples of 0-10 cm soil layer and 0-50 cm soil layer were collected in the field. The contents of 8 large particles (Na +, K +, Mg2 +, Ca2 +, Cl-, SO42-, HCO3- -, CO32-) and pH, conductivity, salinity, salinity. Using GPS positioning technology, the latitude and longitude coordinates of each sampling point were recorded and matched with the radar image. The gray correlation analysis method was used to analyze the effect of HH polarization of Radarsat C band on the distribution of microscopic particles in 0-10cm and 0-50cm soil profiles in spring and autumn response. The results show that the radar image of spring has a strong response to pH value, unstable response to salt content and general response to conductivity and salinity. In the case of the cation, the response to Ca2 + is most pronounced; in the case of the anion, the response to HCO3- is most pronounced. In October, the radar image responded strongly to pH and conductivity, responded to the salinity unsteadily, and responded generally to salinity. In terms of the cation, no obvious regularity. In terms of anions Cl- response is most significant, SO24-, HCO3- no obvious law.