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Hydrologic Response to Future Climate Change in the Dulong-Irra-waddy River Basin Based on Coupled Model Intercomparison Project 6

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Chinese Geographical Science 2024年第2期34卷 294-310页

作者： XU Ziyue MA Kai YUAN Xu he daming Institute of International Rivers and Eco-security Yunnan UniversityKunming 650500China Yunnan Key Laboratory of International Rivers and Transboundary Eco-security Kunming 650500China

Within the context of the Belt and Road Initiative(BRI)and the China-Myanmar Economic Corridor(CMEC),the Dulong-Ir-rawaddy(Ayeyarwady)River,an international river among China,India and Myanmar,plays a significant role as both a valuable hydro-power resource and an essential ecological passageway.However,the water resources and security exhibit a high degree of vulnerabil-ity to climate change impacts.This research evaluates climate impacts on the hydrology of the Dulong-Irrawaddy River Basin(DIRB)by using a physical-based hydrologic model.We crafted future climate scenarios using the three latest global climate models(GCMs)from Coupled Model Intercomparison Project 6(CMIP6)under two shared socioeconomic pathways(SSP2-4.5 and SSP5-8.5)for the near(2025-2049),mid(2050-2074),and far future(2075-2099).The regional model using MIKE She based on historical hydrologic processes was developed to further project future streamflow,demonstrating reliable performance in streamflow simulations with a val-idation Nash-Sutcliffe Efficiency(NSE)of 0.72.Results showed that climate change projections showed increases in the annual precip-itation and potential evapotranspiration(PET),with precipitation increasing by 11.3%and 26.1%,and PET increasing by 3.2%and 4.9%,respectively,by the end of the century under SSP2-4.5 and SSP5-8.5.These changes are projected to result in increased annual streamflow at all stations,notably at the basin’s outlet(Pyay station)compared to the baseline period(with an increase of 16.1%and 37.0%at the end of the 21st century under SSP2-4.5 and SSP5-8.5,respectively).Seasonal analysis for Pyay station forecasts an in-crease in dry-season streamflow by 31.3%-48.9%and 22.5%-76.3%under SSP2-4.5 and SSP5-8.5,respectively,and an increase in wet-season streamflow by 5.8%-12.6%and 2.8%-33.3%,respectively.Moreover,the magnitude and frequency of flood events are pre-dicted to escalate,potentially impacting hydropower production and food security significantly.This research outlines the hydrological response to futu

关键词： climate change hydrologic response Coupled Model Intercomparison Project 6(CMIP6) MIKE She(Système Hydrologique Europeén) Dulong-Irrawaddy River Basin

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Circular RNA circ_0003609 ameliorates hypertrophied ligamentum flavum by regulating the miR-155/SIRT1 axis

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BIOCELL 2024年第6期48卷 1001-1008页

作者： GUIBIN ZHONG SHURONG WANG YUJIN he daming FENG KE WEI YANQIU YANG JIANWEI CheN JUNLING CheN Department of Orthopaedics Baoshan BranchRen Ji HospitalSchool of Medicine Shanghai Jiao Tong UniversityShanghai200444China Department of Orthopaedics Ren Ji HospitalSchool of Medicine Shanghai Jiao Tong UniversityShanghai200127China Department of Operation and Anaesthesia Ren Ji HospitalSchool of Medicine Shanghai Jiao Tong UniversityShanghai200127China Department of Orthopaedics Huai Yuan Chang Jiu HospitalHuaiyuan233499China

Background:Hypertrophy of the ligamentumﬂavum(HLF)is a common contributor to spinal stenosis which results in signiﬁcant neurological impairments.Circular RNA(circRNA)circ_0003609 has been linked to HLF;however,the exact mechanism by which it causes this disease is unclear.Methods:Circ_0003609 expressions were regulated in HLF cells by overexpression vectors and RNA interference.Cell proliferation andﬁbrosis-related gene expression were checked by the Cell Counting Kit-8(CCK-8)assay and western blotting.CircBank’s prediction of the association between miR-155 and circ_0003609 was supported by a dual-luciferase reporter experiment.The function of the miR-155/sirtuin 1(SIRT1)axis in controlling HLFﬁbrosis was further examined.Results:Overexpression of circ_0003609 suppressed HLF cell propagation andﬁbrosis compared to its silencing.It was found that circ_0003609 served as the sponge for miR-155 and that the circ_0003609/miR-155 axis controlled theﬁbrosis of HLF cells.It was found that circ_0003609 acted as a sponge for miR-155,regulating theﬁbrosis of HLF cells.Further,miR-155 targets SIRT1,and the miR-155/SIRT1 axis promotes HLF cellﬁbrosis.Conclusion:Circ_0003609 ameliorates hypertrophied ligamentumﬂavum(LF)by modulating the miR-155/SIRT1 axis,indicating a potential treatment approach for HLF.

关键词： Circular RNA Circ_0003609 Hypertrophy of ligamentum flavum MiR-155 Sirtuin 1 Fibrosis

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近30年来洞里萨湖沿岸土地覆被变化及其对水位的响应

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Journal of Geographical Sciences 2024年第2期34卷 329-354页

作者：张静马凯樊辉何大明 Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security Kunming 650091China Institute of International Rivers and Eco-Security Yunnan UniversityKunming 650091China

The transboundary influence of environmental change is a critical issue in the Lancang-Mekong region.As the largest river-connected lake in the lower Mekong,the ecological change and influence of Tonle Sap Lake have received widespread attention and discussion,especially after 2008,when the hydrological regime of the Lancang-Mekong River mainstream underwent distinct changes.However,the linkage and coupling mechanism between the lake riparian environment and mainstream water level change are still unclear.In this study,the interannual spatiotemporal changes in land cover in the Tonle Sap Lake riparian zone(TSLRZ)and their relationship with mainstream water levels were analysed.The results showed that the expansion of farmland was the most notable change in 1988–2020.After 2008,the land cover changes intensified,manifested as accelerated farmland expansion,intensified woodland fragmentation and significant water body shrinkage.Furthermore,the responses of the water body,degraded land,wasteland and grassland areas to the mainstream water levels weakened after 2008.Evidently,the land cover changes in the TSLRZ in the last 30 years were less related to the mainstream water level change than to local reclamation and logging.These results can offer a new scientific basis for the transboundary influence analysis of hydrological change.

关键词： riparian zone land cover change mainstream water level change and transboundary influence Tonle Sap Lake Lancang-Mekong River

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Variation in transboundary flow of Nujiang River and its correlation with summer monsoon under the effect of the Longitudinal Range-Gorge

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Chinese Science Bulletin 2007年第A2期52卷 148-155页

作者： YOU WeiHong GUO ZhiRong he daming Department of Atmospheric Sciences School of Resource Environment and Earth Science Yunnan University Kunming 650091 China Department of Atmospheric Sciences Nanjing Information Engineering University Nanjing 210044 China Asia Intemational Rivers Center Yunnan University Kunming 650091 China

在在纵的范围峡(LRG ) 的地形学的效果下面的 Nujiang 河 transboundary 流动和夏天季风活动的变化之间的关系被检验。学习基于观察的河流动数据，和他们与环境预言( NCEP )的国家中心和大气的研究( NCAR )的国家中心的重新分析的 U/V ... 详细信息

在在纵的范围峡(LRG ) 的地形学的效果下面的 Nujiang 河 transboundary 流动和夏天季风活动的变化之间的关系被检验。学习基于观察的河流动数据，和他们与环境预言( NCEP )的国家中心和大气的研究( NCAR )的国家中心的重新分析的 U/V 风领域的关联的统计分析，并且国家海洋、大气的管理( NOAA )的出去的 Longwave 放射( OLR )的数据。transboundary 河流动主要被集中在，这被结束湿或雨季(从 5 月到 10 月) ，特别地在夏天或洪水季节(从 6 月到 8 月) 。有一个清楚的趋势让 transboundary 河流动自从 1970 年代，与时间增加，自从 1980 年代特别地明显。由于地形学的东方西方障碍和 LRG 的纵贯的走廊效果，夏天河流动变化大部分与风被相关在高、低的高度南方、在北方。相反，河流动变化显然与风被相关仅仅在高高度，不是在低高度在东方、西。在 OLR 和河流动变化之间的否定关联也是明显的。这些关系是用索引在这篇论文建议了的二夏天季风描述的份量上。索引 MI 2 包括动态并且 thermodynamical 在 Nujiang 河盆的 LRG 区域完成并且给 transboundary 河流动变化的一个通常好的代表。更大的 MI 2 代表更强壮的夏天季风活动和更高的 transboundary 河流动，当更小的 MI 2 建议更弱的季风循环和更低的水流动时。

关键词：怒江夏季季候风纵向岭谷区

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Temporal and spatial changes of agricultural water requirements in the Lancang River Basin

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Journal of Geographical Sciences 2012年第3期22卷 441-450页

作者： Gu Shixiang he daming Cui Yuanlai Li Yuanhua State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan University Yunnan Institute for Investigation Design and Research of Water Resources&Hydropower Engineering Asian International Rivers Center Yunnan University Department of Irrigation Drainage and Rural Water SupplyMWR

Based on the data of eight meteorological stations from the 1950s to 2007, current cropping patterns, field water moisture management, we use the Mann-Kendall and the Rescaled Range Analysis methods to research the changes of humidity and crop irrigation water requirements in the Lancang River Basin. The results show that the annual and dry season average temperatures significantly increased, and the dry season rainfall increased while wet season rainfall decreased. Evaportranspiration （ETo） increased during both dry and wet seasons at all stations except Dali, Jianchuan and Gengma, and the aridity-humidity index decreased at most of the stations. The turning points of weather factors, ETo, the aridity-humidity index, paddy irrigation requirements and total agricultural water requirements occurred from the 1960s to the 1990s. The spatial changing tendency of paddy irrigation quota increased with the increase of altitude and latitude, and the correlation coefficients are 0.513 and 0.610, respectively. The maximum value is observed in Weixi, while the minimum in Mengla.

关键词： agricultural irrigation quota Lancang River the Longitudinal Range-Gorge Region

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The variation and regional differences of precipitation in the Longitudinal Range-Gorge the Region

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Chinese Science Bulletin 2007年第A2期52卷 59-73页

作者： he daming LI ShaoJuan ZHANG YiPing Asia Intemational Rivers Center Yunnan University Kunming 650091 China Xishuangbanna Tropical Botanic Garden Chinese Academy of Sciences Kunming 650223 China

这份报纸基于记录在 36 个气象学的车站在 1960 ～ 2001 期间观察了的每日的降雨在纵的范围峡区域(LRGR ) 检验降水的地区性的差别。在不同空间、时间的规模的降水的地区性的差别被分析，在完成在 LRGR 的特殊走廊障碍功能下面。结果显... 详细信息

这份报纸基于记录在 36 个气象学的车站在 1960 ～ 2001 期间观察了的每日的降雨在纵的范围峡区域(LRGR ) 检验降水的地区性的差别。在不同空间、时间的规模的降水的地区性的差别被分析，在完成在 LRGR 的特殊走廊障碍功能下面。结果显示很靠近的连接在地区性的差别和走廊障碍功能之间存在：在北 LRGR 的大多数区域(> 26 湩？

关键词：地区差异性纵向岭谷区地域性走廊

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大尺度跨境流域径流预测的迁移学习框架--敏感性分析及在数据稀缺流域的适用性

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Journal of Geographical Sciences 2024年第5期34卷 963-984页

作者：马凯申朝鹏许紫月何大明 Institute of International Rivers and Eco-security Yunnan UniversityKunming 650091China Yunnan Key Laboratory of International Rivers and Transboundary Eco-security Yunnan UniversityKunming 650091China Civil and Environmental Engineering Pennsylvania State UniversityUniversity ParkPAUnited States

The imbalance in global streamflow gauge distribution and regional data scarcity,especially in large transboundary basins,challenge regional water resource management.Effectively utilizing these limited data to construct reliable models is of crucial practical im-portance.This study employs a transfer learning(TL)framework to simulate daily streamflow in the Dulong-lrrawaddy River Basin(DIRB),a less-studied transboundary basin shared by Myanmar,China,and India.Our results show that TL significantly improves streamflow pre-dictions:the optimal TL model achieves an average Nash-Sutcliffe efficiency of 0.872,showing a marked improvement in the Hkamti sub-basin.Despite data scarcity,TL achieves a mean NSE of 0.817,surpassing the 0.655 of the process-based model MIKE She.Addition-ally,our study reveals the importance of source model selection in TL,as different parts of the flow are affected by the diversity and similarity of data in the source model.Deep learning models,particularly TL,exhibit complex sensitivities to meteorological inputs,more accu-rately capturing non-linear relationships among multiple variables than the process-based model.Integrated gradients(IG)analysis furtherillustrates TL's ability to capture spatial het-erogeneity in upstream and downstream sub-basins and its adeptness in characterizing dif-ferent flow regimes.This study underscores the potential of TL in enhancing the under-standing of hydrological processes in large-scale catchments and highlights its value for wa-ter resource management in transboundary basins under data scarcity.

关键词： transfer learning streamflow prediction deep learning model sensitivity data scarcity international river

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Climatic difference in dry and wet season under effect of the Longitudinal Range-Gorge and its influence on transboundary river runoff

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Chinese Science Bulletin 2006年第B11期51卷 69-79页

作者： YOU Weihong DUAN Changchun he daming School of Resource Environment and Earth Science Yunnan University Kunming 650091 China Meteorological Institute of Yunnan Province Kunming 650034China Asia Internalional Rivers Center Yunnan University Kunming 650091 China

Based on observed data of transboundary river runoffs in the Longitudinal RangeGorge Region (LRGR) and those of precipitation and air temperature fields in Yunnan, climatic variability in dry and wet seasons under the impact of LRGR and its influence on transboundary river runoff are studied by means of statistical analysis and wavelet transforms. Results show that latitude variations of high correlation center for precipitation field and corresponding transboundary river runoff are not so notable due to the underlying topography of LRGR, while longitude variations are highly marked. In dry season, greater precipitation and slighter relative deviation are observed in the eastern part as compared to those in the western part of LRGR; while lower average temperature and greater standard deviation are found in the eastern part. In wet season, greater precipitation and slighter relative deviation are observed in the western part, while lower average temperature and similar standard deviation are found in the eastern part. Either in dry or wet season, relative deviation of eastern runoff is always greater than that of the western one. LRGR's barrier action is stronger for southwest monsoon but weaker for northeast one. Under the effect of LRGR, precipitation variations in the eastern and western parts are primarily found in smaller timescales, and the variations tend to be insignificant as timescales increase; whereas slighter temperature variations are observed In recent years, precipitation in wet season tended to increase, which in turn resulted in the greater runoff of transboundary rivers. While in the past decade, air temperature showed a climbing trend in both dry and wet season in the LRGR.

关键词：干季湿季气候差异贯穿边界河径流差异水文学

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Spatial Downscaling of the Tropical Rainfall Measuring Mission Precipitation Using Geographically Weighted Regression Kriging over the Lancang River Basin, China

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Chinese Geographical Science 2019年第3期29卷 446-462页

作者： LI Yungang ZHANG Yueyuan he daming LUO Xian JI Xuan Institute of International Rivers and Eco-security Yunnan University Yunnan Key Laboratory of International Rivers and Transboundary Eco-security Yunnan University

Satellite-based precipitation products have been widely used to estimate precipitation, especially over regions with sparse rain gauge networks. However, the low spatial resolution of these products has limited their application in localized regions and watersheds.This study investigated a spatial downscaling approach, Geographically Weighted Regression Kriging(GWRK), to downscale the Tropical Rainfall Measuring Mission(TRMM) 3 B43 Version 7 over the Lancang River Basin(LRB) for 2001–2015. Downscaling was performed based on the relationships between the TRMM precipitation and the Normalized Difference Vegetation Index(NDVI), the Land Surface Temperature(LST), and the Digital Elevation Model(DEM). Geographical ratio analysis(GRA) was used to calibrate the annual downscaled precipitation data, and the monthly fractions derived from the original TRMM data were used to disaggregate annual downscaled and calibrated precipitation to monthly precipitation at 1 km resolution. The final downscaled precipitation datasets were validated against station-based observed precipitation in 2001–2015. Results showed that: 1) The TRMM 3 B43 precipitation was highly accurate with slight overestimation at the basin scale(i.e., CC(correlation coefficient) = 0.91, Bias = 13.3%). Spatially, the accuracies of the upstream and downstream regions were higher than that of the midstream region. 2) The annual downscaled TRMM precipitation data at 1 km spatial resolution obtained by GWRK effectively captured the high spatial variability of precipitation over the LRB. 3) The annual downscaled TRMM precipitation with GRA calibration gave better accuracy compared with the original TRMM dataset. 4) The final downscaled and calibrated precipitation had significantly improved spatial resolution, and agreed well with data from the validated rain gauge stations, i.e., CC = 0.75, RMSE(root mean square error) = 182 mm, MAE(mean absolute error) = 142 mm, and Bias = 0.78%for annual precipitation and CC = 0.95, RMSE = 25 mm, MAE = 16 mm, and Bias = 0.67% f

关键词： precipitation Tropical Rainfall Measuring Mission(TRMM) 3B43 Geographically Weighted Regression Kriging(GWRK) spatial downscaling the Lancang River Basin,China

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Sediment change under climate changes and human activities in the Yuanjiang-Red River Basin

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Chinese Science Bulletin 2007年第A2期52卷 164-171页

作者： he daming REN Jing FU KaiDao LI YunGang Asia International Rivers Center of Yunnan University Kunming 650091 China College of Tourism and Geography Science Yunnan Normal University Kunming 650092 China

气候变化和人的活动是到多山的河里的沉积变化的主要影响因素。基于超过 40 年“记录，在在 Yuanjiang 河(上面的红河) 的更低的活动范围计量车站的 Manhao 的推迟的沉积负担(SSL ) 变化。在这篇论文，沉积和它的驱动程序的变化通过象... 详细信息

气候变化和人的活动是到多山的河里的沉积变化的主要影响因素。基于超过 40 年“记录，在在 Yuanjiang 河(上面的红河) 的更低的活动范围计量车站的 Manhao 的推迟的沉积负担(SSL ) 变化。在这篇论文，沉积和它的驱动程序的变化通过象同步数据比较，传统的关联，线性回归，和 Granger 诱发性那样的不同方法被分析。结果证明(1 ) 年度平均沉积集中(SSC ) 和在 Manhao 车站的 SSL 的一般趋势从 1960 年代正在增加到 1990 年代，并且在 1984 以后有一个快变化时期；( 2 )在1960年代，1970年代，1980年代和1990年代的不同时期期间，在 Manhao 车站的 SSL 和 SSC 是 1.87 ， 2.49 ， 3.129 3.63 kg/m ( 3 )，和 28.7x 10 ( 6 )， 40.3 x 10 ( 6 )， 44.1 x 10 ( 6 )， 60.3 x 10 ( 6 ) t/a 分别地；( 3 )关联分析和 Granger 诱发性测试证明在集水的气候变化是到在1960年代和1990年代的时期的沉积变化的主要开车因素，但是由沉积变化上的多山的人的行动的影响由气候在1970年代和1980年代改变的本地人是比那强烈的；(4 ) 在沉积变化和森林范围变化之间的关联是否定的，它进一步证明沉积变化被人的活动强烈在盆影响。

关键词：沉积物气候变化红河纵向岭谷区

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