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Tibet ; Abies georgei var.smithii virgin forest ; Distribution pattern of precipitation

西藏;冷杉原始森林;降水分配格局

The circulation of volcanic hot spring formed the alteration zone which, together with atmospheric water and subvolcanic hydrothermal solution, formed micro-crystalline quartz that contained adular and sericite.

火山热泉循环形成蚀变晕,此阶段有大气降水的参与;潜火山热液成矿阶段发育的低温微细石英网脉中含冰长石和绢云母。

The mineralization temperature is in a range of 90℃~300℃, and the mineralization fluid is a combination of slightly acidic-slightly alkalic precipitations, seawater and magmatic water.

其成矿温度在90~300℃之间,成矿流体为低盐度的弱酸性-弱碱性大气降水、海水和岩浆水的混合溶液。

The soil had the alkalize characteristic, and the decisive factors were terrain, texture and precipitation, so before the haloxylon ammodendron settled down, the soil had the alkalize characteristic, and the haloxylon ammodendron was alkali-resistant plant, but if the total alkalinity excessively high, the haloxylon ammodendron also grew difficulty.

土壤具有碱化特征,主要是由地形、质地、降水等结构性因素决定的,由此得出荒漠植被梭梭定居之前土壤就具有了碱化特征,梭梭是耐碱性荒漠植被,但总碱度过高的区域梭梭也难以生长,因此土壤酸碱度仍然是该区域影响梭梭生长和分布的重要因子。

Separately speeking, for outward rivers in Cansu (either to the Yellow River or to the Yangtze River), the allocable water resources are mainly the river runoff and groundwater, the priority sequence of water resources allocation would be: the water use for maintenance of local plantation including the environment-oriented and irrigated ones, water use for social and economic activities, and the runoff to lower reaches.

外流河流域的降水首先为当地的植被耗用,剩余的才形成可供开发的地表径流和地下水;水资源配置的顺序是:当地植被耗水,当地社会经济用水,最后形成干支流出境的径流供中下游地区使用。

So in the Valley such as Ankou, it is much more advantage to develop rain-fed agriculture using the natural valley runoff area to collect rainwater.

由于降水的随机性和不可控性,集水效率的高低直接影响到最终的用水量与灌区效益,所以集水效益在整个雨水利用系统中是至关重要的一环。

The strength and location of the subtropical high in the western Pacific Ocean region and the changed atmospherical circulation caused by the El Nio events,which resulted in the abnormal excess precipitation in Hongze Lake catchment,can possibly serve as the physical mechanism of this phenomenon.

这可能是由于El Nio事件通过改变西太平洋副高的强度与位置,以及大气环流形势而引起的降水异常所致。

Pakistan's southern Baluchistan and Sindh provinces are used to heavy rains during the annual monsoon season.

在每年雨季的时候,巴基斯坦南部俾路支斯坦和信德省都有大量降水

The root biomass improved the soil infiltration rate and reduced runoff,the runoff and erosion amount of meadow brome decreased by 98.2%and 99.9% respectively,and the ability of water retention and soil-reinforcement of meadow brome was 5.2 and 1.5 times than that of corn.

同时,草地雀麦010 cm土层根系发达,地下生物量是玉米的2.88倍,可以显著提高自然降水的土壤入渗率,减少地表径流,使坡地年径流量与土壤侵蚀模数减少98.2%和99.9%,保水、固土能力是玉米种植的5.2倍和1.5倍,水土流失防治效果显著。

Under coaction of endogenic geological processes and water and heat conditions, the drainage development, and water formation and transformation in the inland watershed. were indicated hydrological characteristics of periglacial zone. The hydrological process is mainly related with to changes in mountain areas. It by 41% of precipitation in mountain areas as surface discharge flows into middle and lower reaches, which makes up a main physical basis of the quantitative and qualitative relationship for various functional units in the eco-system in mountain front plain.

在内动力地质、水热条件的共同作用下,内陆河流域上游山区的水系发育、水的形成和转化反映出冰缘带水文学特征,水文过程主要和气候变化相关联,山区降水总量的41%以地表径流形式输入中下游地区,构成山前平原生态系统各功能单元数量与质量关系的主要物质基础。

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