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国家自然科学基金(41001011)

作品数:4 被引量:24H指数:2
相关作者:王晋丽黄远洋张志才陈喜张坤更多>>
相关机构:河海大学江苏师范大学更多>>
发文基金:国家自然科学基金国家重点实验室开放基金高等学校学科创新引智计划更多>>
相关领域:天文地球水利工程建筑科学更多>>

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参数线性化率定方法在HBV-IWS模型中的应用被引量:5
2013年
针对误差平方和最小为目标函数率定非线性函数参数会增加不相关的局部优值等问题,提出了参数线性化率定方法,并将其应用于HBV-IWS模型的日模拟和次洪参数优选中。首先通过日模拟理想模型的实例分析,发现参数均能收敛到真值,验证了该方法的可行性;然后对东张水库13年的实测日资料和18场洪水进行应用验证,结果表明,参数线性化率定方法在实际应用中是可行的、合理的,且寻找参数优值的速度较快;同时利用该方法率定敏感性参数,减少了率定所有参数带来的麻烦,提高了参数率定的效率,具有良好的应用前景。
包为民张坤王红艳姜玉婷
关键词:东张水库
Test of newly developed conceptual hydrological model for simulation of rain-on-snow events in forested watershed被引量:1
2013年
A conceptual hydrological model that links the Xin'anjiang hydrological model and a physically based snow energy and mass balance model, described as the XINSNOBAL model, was developed in this study for simulating rain-on-snow events that commonly occur in the Pacific Northwest of the United States. The resultant model was applied to the Lookout Creek Watershed in the H. J. Andrews Experimental Forest in the western Cascade Mountains of Oregon, and its ability to simulate streamflow was evaluated. The simulation was conducted at 24-hour and one-hour time scales for the period of 1996 to 2005. The results indicated that runoffand peak discharge could be underestimated if snowpack accumulation and snowmelt under rain-on-snow conditions were not taken into account. The average deterministic coefficient of the hourly model in streamflow simulation in the calibration stage was 0.837, which was significantly improved over the value of 0.762 when the Xin'anjiang model was used alone. Good simulation performance of the XINSNOBAL model in the WS 10 catchment, using the calibrated parameter of the Lookout Creek Watershed for proxy-basin testing, demonstrates that transplanting model parameters between similar watersheds can orovide a useful tool for discharge forecastin~, in un^au^ed basins.
Si-min QUHan LIUYan-ping CUIPeng SHIWei-min BAOZhong-bo YU
岩体裂隙网络随机生成及连通性研究被引量:17
2013年
基于裂隙几何参数分布的统计特性,应用Monte Carlo模拟技术生成二维裂隙网络。利用无向图方法实现裂隙网络连通图的绘制,并比较了走向服从均匀分布和正态分布的裂隙连通概率。在此基础上,对Balberg等人提出的渗流临界裂隙数(即主干裂隙数)和临界裂隙长度估算方法进行了验证。结果表明,无向图方法可以方便、快捷地实现裂隙网络连通图的绘制;同等条件下走向服从均匀分布比走向服从正态分布的裂隙连通概率大20%左右;当裂隙连通概率大于90%,Balberg等人提出的渗流的临界裂隙数和临界裂隙长度估计值与实际参数值吻合较好,研究成果为裂隙地下水渗流计算提供了分析方法。
王晋丽王晋丽黄远洋陈喜
关键词:岩体MONTECARLO方法裂隙网络连通性地下水渗流
Experimental study of relationship between average isotopic fractionation factor and evaporation rate被引量:1
2010年
Isotopic fractionation is the basis of tracing the water cycle using hydrogen and oxygen isotopes. Isotopic fractionation factors in water evaporating from free water bodies are mainly affected by temperature and relative humidity, and vary significantly with these atmospheric factors over the course of a day. The evaporation rate (E) can reveal the effects of atmospheric factors. Therefore, there should be a certain functional relationship between isotopic fractionation factors and E. An average isotopic fractionation factor ( t~* ) was defined to describe isotopic differences between vapor and liquid phases in evaporation with time intervals of days. The relationship between or* and E based on the isotopic mass balance was investigated through an evaporation pan experiment with no inflow. The experimental results showed that the isotopic compositions of residual water were more enriched with time; tr* was affected by air temperature, relative humidity, and other atmospheric factors, and had a strong functional relation with E. The values of 0~* can be easily calculated with the known values of E, the initial volume of water in the pan, and isotopic compositions of residual water.
Tao WANGWei-min BAOHai-li XUZhen ZHUSi-min QUPeng SHIHai-ying HURui-qi FANQian LI
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