您的浏览器版本太低,请使用IE9(或以上)、谷歌、火狐等现代浏览器。360、QQ、搜狗等浏览器请使用极速模式。
学院发表文章

Winter Wheat Drought Monitoring with Multi-temporal Modis data and AquaCrop Model - A Case Study in Henan Province

发布日期:2020-01-03浏览次数:信息来源:缅甸福利彩科学与技术学院

Yuan Li   Hongshuo Wang   Yan Wang   Jianxi Huang   Xiaodong Zhang

Abstract

In recent years, frequent droughts have caused serious harm to the sustainable development of agriculture and food security. Based on the wide range and real time data, remote sensing was widely employed in drought monitoring. Many researchers have proposed a series of drought monitoring methods based on MODIS data over the past few decades. The AquaCrop model was released by FAO, which is suitable for crop growth monitoring in arid area with its simple interface, less input parameters and good simulation effect. AquaCrop model was applied to the researches on climate change, irrigation strategy, planting management and so on. Many scholars have verified the efficiency of AquaCrop model in arid areas of China. Since AquaCrop model is driven by water, it is reasonable to use it to monitor and reflect the drought process. This study was based on Terra-MODIS data products and agro-meteorological data during the year of 2007-2008, 2008-2009, 2009-2010 and 2011-2012 of Winter Wheat growth periods in Henan Province. In this study, firstly, localizing the AquaCrop by the simulated and observed Canopy Cover (CC), Biomass (B), Yield (Y) and 0-50cm Soil Water Content (SWC). The values between observed and simulated have good consistency, with R2 = 0.9289 of CC, R2 =0.9418 of B, R2 = 0.8309 of SWC. Meanwhile, the simulation results of four growth stages of winter wheat show that the model has good applicability and stability in Henan Province. Secondly, calculating TVDI using MODIS data in the same time range. Finally, analyzing the correlation between the results of two models and observed soil water content in different depth of soil layers. Similarly, the simulation accuracy of two models are better with shallow soil moisture. MODIS TVDI has a highest correlation with 30cm soil water content (r= -0.344), while AquaCrop model with 10cm (r=0.819). The research can provide important reference for drought monitoring of winter wheat and it is helpful for effective agriculture drought monitoring and decision-making.

Keywords

AquaCrop model, Drought monitoring, MODIS TVDI


Winter Wheat Drought Monitoring with Multi-temporal Modis data and AquaCrop Model - A Case Study in Henan Province.pdf

友情链接:天游官网  疯狂飞艇平台  德国pk拾官网  Yabo下载  kg平台  手机赌博的软件  幸运农场官方网  三升体育网址  pk拾人工计划  快三彩票