引用本文:
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 21次   下载 26 本文二维码信息
码上扫一扫!
分享到: 微信 更多
基于MOD16产品的怒江流域中上游蒸散发分布特征研究
范雪梅, 罗贤, 季漩, 李运刚, 黄江成
云南大学亚洲国际河流中心/云南省国际河流与跨境生态安全重点实验室, 云南 昆明 650091
摘要:
[目的]研究怒江流域中上游蒸散发的空间分布特征,为流域水资源合理开发及生态保护提供支撑。[方法]利用气象站点实测降水资料,验证TRMM(tropical rainfall measuring mission)3B43产品在怒江流域中上游的精度,进而对MODIS(moderate-resolution imagine spectroradiometer)全球陆地蒸散发产品(MOD16)在该流域的适用性进行检验。在此基础上,探讨该流域蒸散发及产水量的空间分布特征。[结果]①TRMM3B43数据与站点实测月降水量相关系数R为0.86,在怒江流域中上游使用具有较好精度,MOD16蒸散发量相对偏大,但仍具有一定的适用性;②研究区多年平均蒸散发量为489.4 mm,蒸散发主要集中在300~800 mm;③降水量与蒸散发量的差值(P-E)与降水量(P)的空间分布格局相似,(P-E)/P在无植被地区较大(为0.33),在植被覆盖区相对较小。[结论]研究区多年平均蒸散发量空间分布差异较大,沿河流呈现出低-高-低-高的变化规律;MOD16产品具有覆盖范围广,时空上连续等特点,能够为缺资料地区蒸散发的相关研究提供相对可靠的数据支撑。
关键词:  蒸散发  MOD16  TRMM3B43  青藏高原  怒江流域中上游
DOI:10.13961/j.cnki.stbctb.2019.02.032
分类号:P426.2
基金项目:国家自然科学基金项目“怒江流域中上游水文过程对土壤冻融循环变化的响应机制”(41601026),“怒江上游流域冰雪融水—径流过程及影响机制研究(41561003)”;云南省科技计划项目“气候变化驱动下怒江流域水文过程响应机制研究”(2017FB073)
Spatial Distribution of Evapotranspiration in Middle and Upper Nujiang River Basin Based on MOD16 Products
Fan Xuemei, Luo Xian, Ji Xuan, Li Yungang, Huang Jiangcheng
Asian International Rivers Center of Yunnan University, Yunnan Key Laboratory of International Rivers and Transboundary Eco-security, Kunming, Yu'nnan 650091, China
Abstract:
[Objective] The spatial distribution characteristics were studied in order for rational utilization of water resources utilization and ecological protection in the middle and upper Nujiang River Basin.[Methods] Making use of observations from meteorological stations, the performance of TRMM(tropical rainfall measuring mission) 3B43 product in the middle and upper Nujiang River Basin was verified, and then the applicability of MOD16(moderate-resolution imagine spectroradiometer) products were further examined. The spatial distribution characteristics of evapotranspiration and water yield were analyzed.[Results] ① At monthly scale, the correlation coefficient between TRMM 3B43 estimates and rain gauge observations was 0.86, indicating TRMM 3B43 data had good accuracy in the middle and upper Nujiang River Basin. The evapotranspiration obtained from MOD16 data was higher, but still had applicability. ② The mean annual evapotranspiration in the study area mainly ranged from 300 to 800 mm, and the regional mean value was 489.4 mm. ③ The spatial distribution of (P-E) was similar to that of P, while (P-E)/P(0.33) in barren areas and smaller in vegetation-covered areas.[Conclusion] The spatial distribution of evapotranspiration was heterogeneous, showing a low-high-low-high variation along the river. With widespread coverage and continuous observation, MOD16 products could provide reliable support for evapotranspiration research in lack-data watershed.
Key words:  evapotranspiration  MOD16  TRMM3B43  Tibetan Plateau  middle and upper Nujiang River basin