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Design Example: Design of an Irrigation Channel01:27

Design Example: Design of an Irrigation Channel

353
Trapezoidal channels are widely used in irrigation systems due to their cost-effectiveness and efficiency in conveying water. Trapezoidal channels feature a flat bottom and sloping sides, making them stable and easier to construct compared to other shapes. The bottom width and side slope ratio are determined based on the required flow capacity and site conditions. The side slope is kept gentle for unlined channels to prevent soil erosion.Hydraulic parameters in channel design include the flow...
353
Adaptations that Reduce Water Loss01:57

Adaptations that Reduce Water Loss

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Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
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Water and Mineral Acquisition02:34

Water and Mineral Acquisition

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Specialized tissues in plant roots have evolved to capture water, minerals, and some ions from the soil. Roots exhibit a variety of branching patterns that facilitate this process. The outermost root cells have specialized structures called root hairs that increase the root surface, thus increasing soil contact. Water can passively cross into roots, as the concentration of water in the soil is higher than that of the root tissue. Minerals, in contrast, are actively transported into root cells.
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Regulation of Water Output01:26

Regulation of Water Output

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The human body predominantly expels water through the urinary system. On average, an individual generates around 1.5 liters of urine each day. This amount can fluctuate based on how well a person is hydrated, but a critical minimum quantity of urine must be produced to ensure the body's proper functioning. Daily, the kidneys remove 600 to 1200 milliosmoles of dissolved substances, effectively excreting excess minerals and water-soluble toxins such as creatinine, urea, and uric acid from the...
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Weir: Problem Solving01:26

Weir: Problem Solving

191
Water flow in open channels is often measured using hydraulic structures such as weirs, which allow precise calculation of discharge. In a rectangular channel, flow rates are measured using three types of weirs: rectangular sharp-crested, triangular sharp-crested, and broad-crested. The weir head is set at a fixed height above the channel bottom, simplifying calculations and enabling the relationship between depth and flow rate to be analyzed.For the rectangular sharp-crested weir, the flow...
191
Osmoregulation in Insects01:47

Osmoregulation in Insects

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Malpighian tubules are specialized structures found in the digestive systems of many arthropods, including most insects, that handle excretion and osmoregulation. The tubules are typically arranged in pairs and have a convoluted structure that increases their surface area.
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Updated: Nov 7, 2025

Mesocosm-Scale Constructed Wetland Design for Wastewater Treatment
08:24

Mesocosm-Scale Constructed Wetland Design for Wastewater Treatment

Published on: May 2, 2025

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砂漠の水の利用可能性

Erick J Lundgren1,2,3, Daniel Ramp4, Juliet C Stromberg5

  • 1Centre for Compassionate Conservation, Faculty of Science, University of Technology Sydney, Ultimo, NSW, Australia. erick.lundgren@gmail.com.

Science (New York, N.Y.)
|April 30, 2021
PubMed
まとめ
この要約は機械生成です。

北米 の 砂漠 で の 野良 の ろば や 馬 は 井戸 を 掘り起こし,水 の 重要 な 源 を 生み出す. これらの"エキッド・ウェル"は 野生動物と植物の多様性を高め 乾燥に対する生態系の回復力を高めます

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Continuous Hydrologic and Water Quality Monitoring of Vernal Ponds
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Continuous Hydrologic and Water Quality Monitoring of Vernal Ponds

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Parameterizing V-notch Weir Equations for Flow Monitoring in a Drainage Control Structure
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Parameterizing V-notch Weir Equations for Flow Monitoring in a Drainage Control Structure

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関連する実験動画

Last Updated: Nov 7, 2025

Mesocosm-Scale Constructed Wetland Design for Wastewater Treatment
08:24

Mesocosm-Scale Constructed Wetland Design for Wastewater Treatment

Published on: May 2, 2025

560
Continuous Hydrologic and Water Quality Monitoring of Vernal Ponds
06:37

Continuous Hydrologic and Water Quality Monitoring of Vernal Ponds

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Parameterizing V-notch Weir Equations for Flow Monitoring in a Drainage Control Structure
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Parameterizing V-notch Weir Equations for Flow Monitoring in a Drainage Control Structure

Published on: April 25, 2025

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科学分野:

  • エコロジー
  • 生態系工学
  • 砂漠の生態学

背景:

  • メガファウナは生物圏の機能に大きな影響を与えますが,乾燥地の生態系を形作る役割はまだ十分に研究されていません.
  • 乾燥地帯の生態系は 人為活動による干ばつの増加に直面しており 回復力メカニズムを理解する必要性を強調しています

研究 の 目的:

  • 北米の砂漠における野生の馬 (ろば,馬) の見過ごされた生態系工学の役割を調査する.
  • 脊椎動物活動と河岸樹木の樹立に及ぼす影響の評価

主な方法:

  • 北米の砂漠の地下水にアクセスするために 野生の馬が井戸を掘ったことを記録しています
  • 隣接する乾いた場所と比較して,水特性の密度と近接度が量化されています.
  • 比較された脊椎動物の富と活動 群馬群と対照群
  • 岸辺の樹木の繁殖を促すための馬の井戸の役割を観察した.

主要な成果:

  • 野生の馬は2メートル深さの井戸を掘り 井戸の数を増やし 水源間の距離を短くします
  • 馬の井戸は重要な水資源を提供し,時には唯一の水源でした.
  • 隣接する乾いた場所よりも,より高い脊椎動物の富と活動が記録されました.
  • 河馬の井戸は 洪水による乱れを模倣し 川岸の樹木の育児に 適した条件を作り出しました

結論:

  • 野生の馬は,乾燥した環境で水源を作り,維持することで,重要な生態系エンジニアとして機能します.
  • 群馬が生み出した水域は 生物多様性と生息地の接続性を高め 乾燥を防ぎます
  • 野生の馬は 乾燥地帯の生態系が 気候変動への抵抗力を高める上で 重要な役割を果たすことができます