卤水比蒸发系数的数学模型—石盐析出阶段和光卤石析出阶段

本文在察尔汗盐湖卤水不同浓缩阶段比蒸发实验的基础上,比较系统地处理了该实验的数据,建立了在石盐析出阶段和光卤石析出阶段卤水比蒸发系数的数学模型,给出了与卤水密度和大气相对湿度相关的经验方程式。     

低Peclet数下剪切流中气溶胶粒子的传质率

本文研究了低Péclet数下剪切流中气溶胶粒子的传质率。Péclet数(Pe)是物质浓度的对流输送项对分子扩散项的比。它等于Reynolds数(Re)与Schmidt数的(Sc)之积。本文应用奇异扰动方法得到了无因次传质率Nu(Nusselt数)在小Péclet数条件下的四项渐近展式，因而?改进了前人的结果。     

黑河干流山区流域月蒸发力计算模型

研究西北内陆河山区流域的水文循环,对于维持区域可持续发展和生态环境的保护具有重要意义。应用数值迭代方法,对黑河山区流域平均月蒸发力与月平均气温和月降水量的关系进行了探讨。结果表明,山区平均月降水量、月平均气温和月蒸发力之间存在着复杂的非线性关系,降水和气温都是影响蒸发力的一个综合因子。     

四川紫色雏形土的蒸发性及其与土壤结构性的关系

结合四川土壤基层分类 ,选取四川紫色雏形土的几个土系 ,对土壤的水分发性能及其与土壤结构性尤其是机械组成和微团聚体组成的相关关系分析发展 ,土壤水分蒸发具有明显的阶段性 ;土壤水分累积蒸发量与蒸发历时之间总体上符合乘幂方程 ;土壤蒸发速度与〈0 .0 0 1mm的颗粒含量呈明显相关关系 ,与 >0 .2 5mm的大团聚体含量呈明显负相关关系。     

Jewish settlement of Hebron: The place and the other1

Kiryat-Arba and Jewish Hebron are communities planted in the most heated front of the Israeli-Palestinian conflict. This paper examines how the Hebron Jewish settlers' collective memory interprets the `truth' of Hebron as a typical Israeli Place that reveals Zionism in its purest form. Today the populations of Kiryat-Arba and of the Hebron Jewish enclaves number about 5,000 and 500, respectively. Kiryat-Arba functions as an economic and educational centre for the nearby Jewish settlements in the region. Rejecting the segregative concept of a separate Jewish settlement overlooking Hebron, the settlers treat Kiryat-Arba as part of Hebron. Some 70,000 Palestinians live in Hebron, many more residing in neighbouring towns and villages, cutting Hebron – Kiryat–Arba off from the nearest Jewish urban centres of Jerusalem and Beer-Sheva. The settlers initiated the narrative of `Return' to the city after the massacre of Jews in 1929 in the city, as the key symbol Symbolically, the first place Hebron Jews reidentified with was its ancient Jewish graveyard. Today, IDF soldiers protect settlers and their visitors who want to tour Hebron. The huge gulf between `metaphorical Hebron' as a symbolic centre and `actual Hebron' as a poor development town creates tensions fuelling violent events. The Jews in Hebron take the Israeli logic of `Place' making to its extreme, thus testing concepts of Israeli territoriality. If Israeli society rejects Hebron as a `Place' constructed from intense memories and violent national encounters, it would leave the Hebron Jews out of the so-called Israeli normalcy.     

土壤-植物-大气连续体模型中的蒸散发计算

土壤-植物-大气连续体(SPAC)中包括一系列的水分与能量交换过程.本文侧重探讨蒸发与蒸腾的过程及其定量.主要内容包括(SPAC)综合模型;各种蒸散发参数的确定;作物蒸腾量的确定;棵间土壤表面蒸发量的确定.用实际观测资料进行验算,得出比较符合实测过程的蒸发和蒸腾计算结果.     

A remote sensing model for monitoring soil evaporation based on differential thermal inertia and its validation

To develop geosciences quantification and multi-dimensional researches will be an inevitable trend in the 21st century. The interaction between the land surface and the atmosphere not only serves as an important component in geosciences quantification, bu…     

新疆渭干河灌区水文地质条件变化及排水措施探讨

渭干河灌区的水土环境及水文地质条件在克孜尔水库建成后发生了一定的变化,本文结合灌区12年来的水盐监测资料,对灌区地下水的埋深变化规律、水质演变趋势、灌区的排水效果及目前存在的问题进行了分析与探讨,并为今后灌区排水措施和保持水土环境的良性发展提出了建议.     

Comparison of 15 evaporation methods applied to a small mountain lake in the northeastern USA

Few detailed evaporation studies exist for small lakes or reservoirs in mountainous settings. A detailed evaporation study was conducted at Mirror Lake, a 0.15 km² lake in New Hampshire, northeastern USA, as part of a long-term investigation of lake hydrology. Evaporation was determined using 14 alternate evaporation methods during six open-water seasons and compared with values from the Bowen-ratio energy-budget (BREB) method, considered the standard. Values from the Priestley–Taylor, deBruin–Keijman, and Penman methods compared most favorably with BREB-determined values. Differences from BREB values averaged 0.19, 0.27, and 0.20 mm d⁻¹, respectively, and results were within 20% of BREB values during more than 90% of the 37 monthly comparison periods. All three methods require measurement of net radiation, air temperature, change in heat stored in the lake, and vapor pressure, making them relatively data intensive. Several of the methods had substantial bias when compared with BREB values and were subsequently modified to eliminate bias. Methods that rely only on measurement of air temperature, or air temperature and solar radiation, were relatively cost-effective options for measuring evaporation at this small New England lake, outperforming some methods that require measurement of a greater number of variables. It is likely that the atmosphere above Mirror Lake was affected by occasional formation of separation eddies on the lee side of nearby high terrain, although those influences do not appear to be significant to measured evaporation from the lake when averaged over monthly periods.     

空气动力学阻抗的测量研究

利用涡旋相关方法和蒸发皿方法分别测量了裸地和玉米田的空气动力学阻抗, 分析了空气动力学阻抗的日变化特征, 同时对两种测量方法进行了比较。结果表明:实测空气动力学阻抗的日变化比较明显, 但变化幅度不大 (0~200 s/m)。两种方法得到的空气动力学阻抗具有可比性, 但蒸发皿方法测量的空气动力学阻抗普遍小于涡旋相关方法的测量值。