复垦土壤盐分污染的微波频谱分析

复垦工程完成后，复垦土壤的结构、层次等受到破坏，易发生盐碱化，微波的穿透性为土地质量的监测提供可能。该试验通过对复垦土壤在不同水分条件下，不同盐分污染程度的探地雷达探测，旨在揭示盐分污染下，微波信号的变化规律。结果表明：中心频率为400 MHz的天线在不同程度的盐分污染下，主频发生偏移，出现在250 MHz。随着盐分污染的加重，出现双峰现象，次主频出现在530 MHz，且随着盐分污染的加重次主频的相对振幅逐渐加强，不同的水分含量系列下，出现相同的现象。由于探地雷达可以快速、大面积的无损探测，因此，能够及时提供复垦土壤盐分变化的信息，可以对复垦土地的质量实时监测、及时治理。

Microwave spectrum analysis of salinity pollution about reclamation soil

After reclamation engineering completed, the structure and layer of reclamation soil is damaged and the soil is easy to become saline-alkali soil. Microwave has the penetrability that provides the possibility to detect the reclamation soil quality. The different degree saline pollution soils under the different water contents by ground penetrating radar were detected, which discover the microwave change law of different salinity pollution. Results show that basic freguency of the antenna which center frequency is 400 MHz change to 250 MHz under salinity pollution. With salinity pollution aggravating, the double peak phenomenon comes forth. Subdominant frequency is 530 MHz. With salinity pollution aggravating, the relative amplitude of subdominant frequency enhanced, and it shows similar phenomena in different water content series. The ground penetrating radar could realize non-destructively investigates the subsurface quickly and widely, so it could provide the changing information in time. It can be used to real-time inspect the reclamation land quality and to control deterioration of reclamation soil as soon as possible.