基于GEE遥感数据的石羊河流域人工增雨效果检验和评估研究

Test and evaluation of artificial rainfall enhancement effect in Shiyang River Basin based on GEE remote sensing data

摘要:

通过人影作业效果评估与长时间序列遥感资料相结合的方式，对石羊河流域2010-2020年的降雨量进行深入分析，评估增加作业点和作业量后的人工增雨效果。同时基于Google Earth Engine平台的长时间序列Landsat遥感数据建立了像元二分模型，定量分析人工增雨前后石羊河流域植被覆盖及其时空动态变化。结果表明，作业区平均相对人工增雨效果为20.8%（P<0.1%）。在2010-2020人工增雨年间，沙地或裸地中有1017.56 km²转化为草地。通过人工增雨和自然降水的共同作用，2010年以后石羊河流域植被覆盖面积由增雨前的20.2%增加到增雨后的27.24%，改善状况变化更为明显。人工增雨技术在改善石羊河流域生态环境方面发挥了积极的推动作用，为当地的生态平衡和可持续发展做出了重要贡献。

Abstract:

Through the combination of shadow operation effect assessment and long time series remote sensing data， the precipitation of Shiyang River Basin from 2010 to 2020 was deeply analyzed， and the effect of artificial rainfall enhancement after increasing the operation point and operation amount was evaluated. At the same time， based on the long-term Landsat remote sensing data of Google Earth Engine platform， a pixel binary model was established to quantitatively analyze the vegetation cover and its spatio-temporal dynamic changes in Shiyang River Basin before and after artificial rainfall enhancement. The results showed that the average relative rainfall enhancement effect was 20.8% （P<0.1%）. During the period of 2010-2020， 1017.56 km² of sandy or bare land will be transformed into grassland. Through the combined effect of artificial rain enhancement and natural precipitation， the vegetation coverage area of Shiyang River Basin increased from 20.2% before rain enhancement to 27.24% after rain enhancement in 2010， and the improvement was more obvious. Artificial rain enhancement technology has played a positive role in improving the ecological environment of the Shiyang River basin， and has made important contributions to the local ecological balance and sustainable development.