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watershed相关的网络例句

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Because change of volume reflected eroding process of watershed and surface change reflected change of topography surface, this model described relationship between watershed topograph and erosion.iv As a quantitative index of wateshed topography, topograph fractal demension can represent surface shape information of watershed topography in the round. Reseach find that watershed model and actual watershed show good fractal character. Topography fractal dimension related with process of development of watershed physiognomy and represented degree of watershed development, v Sediment yield intensity of watershed model reflected erosion characteristic of watershed model in different development phase.

流域模型产沙强度的变化反映了流域模型在不同发育阶段的侵蚀特征,模拟试验研究结果表明:在整个流域模型地貌地貌的发育过程中,其产沙强度呈现由小到大,然后又逐渐减小的总体趋势,流域模型单位降雨产沙率及平均输沙率与地形分维数表现为Gaussian模型关系,其关系形式与结论3中相对体积和表面积之间关系相似,进一步说明了以地形分维数表达地形变化的合理性。

Based on field investigation and historical data analyzing, the characteristics and causes of flood disasters of Qinba Mountain area were discussed in this paper. Take the harnessed Watershed and unharnessed Watershed as comparative study objects, through analzing the two typical watershed land using and rainfall-runoff dynamic data, combinating the in-situ soil infiltration field testing, a rainfall-runoff model of small watershed which was appropriate to Qinba Mountain areas was built based on improving the SCS model. And then the influence of soil and water conservation measures on the flood processes was analysed.

本文通过野外调查与历史调查资料,阐述了秦巴山地区洪水灾害的特点及成因,以治理流域与未治理流域为对比研究对象,通过对两条典型流域的土地利用状况分析,结合土壤入渗原位测试,充分利用降雨、径流动态观测资料,以SCS模型模拟降雨径流为重点,建立适合于秦巴山地区小流域的降雨径流计算模型,分析水土保持措施对于洪水的作用过程。

Based on DEM data of different development periods of a indoor watershed model obtained from the integration of artificial simulated rainfall experiment and high accuracy digital photogrammetry technique, the fractal dimensions of topographic feature under different development periods of the indoor watershed model based on variation method were calculated and the relationships between watershed topographic feature fractal dimension and topographic factors such as watershed gully density as well as ground lacerative degree was discussed preliminarily.

以室内流域模型人工模拟降雨试验和高精度摄影测量获得的模型流域不同发育时段的数字高程模型数据为基础,采用变分法计算了流域地貌形态分形维数,并对分形维数与地貌因子沟谷密度和地面割裂度的关系进行初步探讨。

The five case studies are in the Jinhua watershed in Zhejiang province, the Supa watershed and Xiaozhaizi watershed in Yunnan province, Meijiang watershed in Jiangxi provin

进而,作者还发现了清代秋审和朝审的一个重要司法功能,即在一定程度上超越成文法典,通过司法的手段纠正立法的偏失,追求天理、国法、人情的高度统一,从而实现公平与正义的结果。

This project mainly Yuzui watershed embankment, Feisha spillway weir, three-bottle most of the intake and Baizhang embankment, were the words ancillary works on a dike, scientific solution to automatically divert the river (Yuzui watershed embankment 40 6 watershed), the automatic flushing (Yuzui watershed sand embankment on February 8 points), control water flow and other issues, eliminate the flooding, the West Sichuan Plain to become a "people from the flood and drought""Land of Abundance."

这项工程主要有鱼嘴分水堤、飞沙堰溢洪道、宝瓶口进水口三大部分和百丈堤、人字堤等附属工程构成,科学地解决了江水自动分流、自动排沙、控制进水流量等问题,消除了水患,使川西平原成为&水旱从人&的&天府之国&。1998年灌溉面积达到到66.87万公顷,灌溉面积已达40余县。

The results show that various of land productivities between different land types in Nihegou Watershed are very great, land productivities for forest land are highest, wild meadow and orchard land middies, and farmland are lowest; On whole Watershed, tile land productivity for farmland drops off from village to the edge of watershed, and general decreases as the soil erosion intensity increases.

结果显示:泥河沟流域土地生产力的变化差异很大,总体上以林地最高,果园和草地次之,农地最低;整个流域土地生产力呈现出以村庄为中心辐射状递减和斑状交错分布特征,土地生产力随着土坡侵蚀强度增大呈现指数规律减小。

No.31small watershed based on plant was affected people's interfere more and faced more environment effect. Watershed system instructive intend irrationality, and function misadjust, and health general; 3 No.34 small watershed based on woodland was affected people's interfere less and faced less environment effect.

以耕地为主的小流域31受到人类活动干扰的影响大,面临的外界压力大,在强大的外界压力作用下,流域生态系统的内部结构倾向不合理,功能严重失调,恢复能力差,变化大,目前健康状态一般,但如果不进行科学的利用和保护,土壤肥力将进一步下降,最终将会严重影响国民经济的发展,人民生活水平的提高。

Firstly, according to study dynamic changes of the elements structures in succession about natural and artificial forest, then summarized regular patterns;at the same time.based on the study of Coupling Relationship between structure and function of water conservation forest established the ideal structures from the stand level and the watershed level. The ideal structures from the stand level: uneven-aged, double layer and mixed structure, and trend to natural forest. The watershed level followed the same principle, that is double layer patches, uneven-aged forest well-distributed and to build up different forest patches in watershed.

首先,经过对北京山区水源林天然林和人工林结构要素的演替动态研究,提出其发展规律,同时依据水源林结构与功能耦合关系研究,从林分层次和流域层次上分别构建了水源林的理想结构,其中,林分层次上水源林的理想结构为:异龄、复层、混交的结构状态,林分结构趋于天然林结构的特征;在流域层次上水源林的理想结构为也应形成&复层&、&异龄&、&混交&的结构,即:在流域各水源林斑块间形成林冠层复层、斑块内部乔木、灌木、草本层的复层;不同水源林年龄面积上的均匀分布;形成不同水源林斑块间的镶嵌分布。

In order to address the imbalance between water quality and designated use in the Jinhua River watershed, an environmental management mode for the watershed was developed based on assimilative capacity.

为解决金华江流域义乌段水质与水功能区要求间失衡的环境问题,建立基于水体纳污能力的流域水环境管理模式。

General Hydrology Comments and Questions; Water Resources Conferences and Hydrology Training; Developing Country Water Resources Issues; Groundwater, Ground Water, Hydrogeology, and Geohydrology; Groundwater, Surface Water, Watershed and Geochemical Modeling; Surface Water, Watershed Hydrology, Glaciology and Limnology; Innovative Water Pollution Cleanup Technologies

伊拉克水资源;水文学工作;新成果、新模型软件、新水文学教材;水文学建议与问题;水资源会议和水文学培训;发展中国家水资源问题;地下水、水文地质学、地下水文学;地下水、地表水、流域和地球化学模型;地表水、流域水文学、冰河学和湖沼学;水污染治理创新技术

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