毛烏素沙地植被恢復與蒸發散耦合關係變化的研究

CHANGES IN THE COUPLING RELATIONSHIP BETWEEN VEGETATION RESTORATION AND EVAPOTRANSPIRATION IN MU US SANDY LAND

戚展碩(Zhan-Shuo Qi) ； 崔晨風(Chen-Feng Cui) ； 張洵(Xun Zhang) ； 王子君(Zi-Jun Wang)

《中國土木水利工程學刊》 35卷1期 (2023/03) Pp. 91-98

https://doi.org/10.6652/JoCICHE.202303_35(1).0010

摘要

利用中國國家級地面站降雨日值資料、MODIS植被指數產品與蒸發散產品，監測分析了毛烏素沙地治理工程實施以來，毛烏素沙地蒸發散與地面植被覆蓋、降雨時空變化的耦合關係。研究發現：（1）2001～2017年間毛烏素沙地植被恢復效果顯著，東南大部分地區NDVI呈現顯著增加趨勢，而在西北部分地區NDVI則呈現減少趨勢，佔研究區總面積的0.41%；（2）在植被覆蓋程度較低時毛烏素沙地各月份蒸發散差異較大，2001～2017年植被覆蓋持續增加，各月份間蒸發散變異係數下降65%；（3）隨著植被覆蓋增加，在6月與9月，蒸發散與降雨的相關性降低，而與植被覆蓋的相關性及相關顯著性增加。在3月與12月，蒸發散與植被覆蓋的相關性及相關顯著性降低，而與降雨的相關性及相關顯著性增加。

關鍵字

植被恢復 ； 毛烏素沙地 ； 蒸發散耦合 ； NDVI

並列摘要

This paper used the daily rainfall data of National ground stations in China, MODIS vegetation index products and evapotranspiration products to monitor and analyze the coupling relationship between evapotranspiration to temporal and spatial changes of vegetation cover and to rainfall, since the implementation of the Mu us Sandy Land environment rehabilitation project. The study found that: (1) From 2001 to 2017, the vegetation restoration effect of the Mu Us Sandy Land was remarkable, and the NDVI showed a significant increase trend in most parts of the southeast, while the NDVI in some parts of the northwest showed a decreasing trend, accounting for 0.41% of the total area of the study area. (2) When the vegetation coverage was low, the evapotranspiration in the Mu Us Sandy Land varied greatly, and the coefficient of variation between the months of the year when the vegetation coverage continued to increase from 2001 to 2017 decreased by 65%. (3) In June and September, the correlation and correlation significance of evapotranspiration with rainfall decreased, while the correlation and correlation significance of evapotranspiration with vegetation cover increased. In March and December, the correlation and correlation significance of evapotranspiration with vegetation cover decreased, while the correlation and correlation significance with rainfall increased.

並列關鍵字

vegetation restoration ； mu us sandy land ； evapotranspiration coupling ； NDVI

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