seasonal zone 中文意思是什麼
seasonal zone
解釋
季節帶-
Meanwhile, most aspects about this perspective are concerned, which include quantification of the soil water background of the plateau area, the regional spatial variation of soil water background and variation along the slope, mosaic structure and seasonal changes etc. the results show that : ( 1 ) for the fundamental circumstance for vegetation development is the original debilitated slope, so the perspective of soil water background specially for the loess plateau refers to the soil water conditions on the original slope. ( 2 ) the value of soil water background appears to be a descending trend from south to north based on the difference of vegetation zones. in the forest zone, soil moisture contents beneath 3m depth from the soil surface are more than 12 % usually ; in the forest - pasture zone, the values of soil moisture content beneath 4m depth underground are more than 6 % and stable, and tend to be ascending while the depth increases ; but the values in the dry pasture zone is lingering between 4 % to 6 % from the surface layer to sub - layers
發展了「土壤水分背景」的概念，並以之為基礎對其各個方面進行了研究，使之形成一個相對獨立和完整的體系，主要包括黃土高原土壤水分的背景值、土壤水分背景的區域分異、坡面分異、鑲嵌結構及其季節分異等： （ 1 ）由於植被生長發展、演替的基礎階段是天然草被群落，故認為黃土高原的土壤水分背景在概念上是特指該區天然草被群落下的土壤水分狀況； （ 2 ）黃土高原的土壤水分背景值，根據植被地帶的不同表現出自南向北逐漸降低的規律：森林地帶3米以下土層水分背景值普遍穩定地高於12 ，森林草原地帶4米以下土層水分背景值穩定大於6 ，且均隨土層的加深水分含量逐漸增加，而草原帶的土壤水分背景值自土表至底土層一直在4 6之間徘徊。 -
Seasonal variation of macrophytes root - zone microorganisms and purification effect in the constructed wetland system
人工濕地植物根區微生物與凈化效果的季節變化 -
Forst heaving and thawing settlement of subgrade in seasonal frozen soil zone
季節凍土區公路路基細粒土凍脹敏感性研究 -
The paper research the problem of depression of bridge approach of seasonal frozen zone according to highway chang ? u. it includes common ground soft ground, includes analysis of economic and engineering. at the same time, some treasures have been analyzed in contrast. the paper presents some measures to copy with soft ground and common ground
本文結合長余高速公路對季凍區的橋頭路堤沉降進行了分析，既有一般地基又有軟土地基，同時針對軟土地基的處置方式進行了深入的對比分析，既有技術上的又有經濟上的，還給出了對一般地基和軟土地基的一般處理方法，同時提出了應把橋頭跳車率控制在5以內的理論。
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