Evapotranspiration estimation and validation at 16 m resolution based on ETMonitor model driven by GF-1 satellite remote sensing datasets

نویسندگان

چکیده

蒸散发(Evapotranspiration,简称ETï¼‰æ˜¯ç ”ç©¶åœ°è¡¨æ°´å¾ªçŽ¯è¿‡ç¨‹å˜åŒ–å’Œå¼€å±•ç”°é—´æ°´åˆ†ç®¡ç†çš„æ ¸å¿ƒå˜é‡ä¹‹ä¸€ã€‚é¥æ„Ÿæ˜¯èŽ·å–å¤§èŒƒå›´åŠ¨æ€è’¸æ•£å‘çš„ä¸€ä¸ªä¸»è¦æ‰‹æ®µï¼Œä½†çŽ°æœ‰è’¸æ•£å‘äº§å“åˆ†è¾¨çŽ‡ä¸»è¦ä»¥ä¸­ä½Žåˆ†è¾¨çŽ‡ï¼ˆ1—25 kmï¼‰ä¸ºä¸»ï¼Œéš¾ä»¥æ»¡è¶³ç”°é—´æ°´åˆ†ç®¡ç†çš„åº”ç”¨éœ€æ±‚ã€‚å›½äº§é«˜åˆ†ä¸€å·å®½å¹ ç›¸æœºå ·æœ‰é«˜æ—¶ç©ºåˆ†è¾¨çŽ‡ç‰¹ç‚¹ï¼Œç©ºé—´åˆ†è¾¨çŽ‡ä¸º16 mï¼Œèƒ½å¤Ÿä¸ºé«˜æ—¶ç©ºåˆ†è¾¨çŽ‡è’¸æ•£å‘äº§å“ç”Ÿäº§æä¾›æ•°æ®æ”¯æ’‘ã€‚æœ¬æ–‡åˆ©ç”¨å›½äº§é«˜åˆ†ä¸€å·å«æ˜Ÿé¥æ„Ÿæ•°æ®åæ¼”çš„åœ°è¡¨å‚æ•°ï¼ˆåŒ æ‹¬å¶é¢ç§¯æŒ‡æ•°ã€æ¤è¢«è¦†ç›–åº¦å’Œåç §çŽ‡ç­‰ï¼‰ä½œä¸ºé©±åŠ¨ï¼Œè¯„ä¼°äº†é‡‡ç”¨ETMonitorè’¸æ•£å‘é¥æ„Ÿæ¨¡åž‹èŽ·å–é«˜åˆ†è¾¨çŽ‡è’¸æ•£å‘çš„èƒ½åŠ›å’Œç²¾åº¦ã€‚ç ”ç©¶ä¸­æ”¶é›†é»‘æ²³æµåŸŸã€é—ªç”µæ²³æµåŸŸã€æ²³åŒ—æ€€æ¥ã€è¥¿è—çº³æœ¨é”™ç­‰16ä¸ªç«™ç‚¹çš„æ¶¡åŠ¨ç›¸å ³ä»ªåœ°é¢è§‚æµ‹æ•°æ®å¼€å±•è’¸æ•£å‘ä¼°ç®—çš„éªŒè¯ï¼Œä¸‹åž«é¢ç±»åž‹ä¸»è¦æ¶µç›–å†œä½œç‰©ã€è‰åœ°ã€æ£®æž—å’Œè£¸åœ°ç­‰ã€‚éªŒè¯ç»“æžœè¡¨æ˜Žï¼šé«˜åˆ†ä¸€å·å«æ˜Ÿé¥æ„Ÿä¼°ç®—æ—¥è’¸æ•£å‘å‡æ–¹æ ¹è¯¯å·®ä¸º0.85 mm d-1ï¼Œç›¸å ³ç³»æ•°ä¸º0.79,偏差为0.16 d-1,估算精度较高。与中低空间分辨率(例如1 km)蒸散发数据相比,基于高分一号卫星遥感估算的16 måˆ†è¾¨çŽ‡è’¸æ•£å‘åœ¨åœ°è¡¨å¼‚è´¨æ€§è¾ƒå¼ºçš„åŒºåŸŸæ›´å ·ä¼˜åŠ¿ï¼Œèƒ½è¾ƒå¥½åœ°åæ˜ ç”°å—å°ºåº¦çš„è’¸æ•£å‘ç©ºé—´åˆ†å¸ƒå·®å¼‚ã€‚æ•´ä½“æ¥è¯´ï¼ŒåŸºäºŽå›½äº§é«˜åˆ†å«æ˜Ÿé¥æ„Ÿç»“åˆETMonitor模型能够获取精度较高的高时空分辨率蒸散发产品,有望满足日益精细化的农业水资源利用及管理的应用需求。

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ژورنال

عنوان ژورنال: Journal of remote sensing

سال: 2023

ISSN: ['1007-4619', '2095-9494']

DOI: https://doi.org/10.11834/jrs.20232477