IDEAS home Printed from https://ideas.repec.org/a/gam/jijerp/v16y2019i17p3045-d259850.html
   My bibliography  Save this article

The Ecological Water Demand of Schizothorax in Tibet Based on Habitat Area and Connectivity

Author

Listed:
  • Zili Zhou

    (State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China)

  • Yun Deng

    (State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China)

  • Yong Li

    (State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China)

  • Ruidong An

    (State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China)

Abstract

Water resource regulation is convenient for humans, but also changes river hydrology and affects aquatic ecosystems. This study combined a field investigation and two-dimensional hydrodynamic model (MIKE21) to simulate the hydrodynamic distribution from 1 March to 30 April of 2008–2013 and establish the HDI (habitat depth suitability index) and HVI (habitat velocity suitability index) based on static hydraulic conditions at typical points. Additionally, by using MIKE21 to simulate the hydraulic state in the study area under 20 flow conditions from 530–1060 m 3 /s, and combining these states with the HCI (habitat cover type suitability index), HDI, and HVI, we simulated the WUA (weighted usable area) and habitat connectivity under different runoff regulation scenarios to study the water requirements of Schizothorax during the spawning period in the Yanni wetland. The results showed the following: (1) the suitable cover type was cobble and rock substrate, with nearby sandy land; furthermore, the suitable water depth was 0.5–1.5 m, and the suitable velocity was 0.1–0.9 m/s. (2) Using the proximity index to analyse the connectivity of suitable habitats, the range of ecological discharge determined by the WUA and connectivity was 424–1060 m/s. (3) Habitat quality was divided into three levels to detail the flow demand further. When the flow was 424–530 m 3 /s or 848–1060 m 3 /s, the WUA and connectivity generally met the requirements under natural conditions. When the flow was 530–636 m 3 /s or 742–848 m 3 /s, the WUA and connectivity were in a good state. When the flow was 636–742 m 3 /s, the WUA and connectivity were in the best state. This study complements existing research on the suitability of Schizothorax habitat in Tibet, and introduces the connectivity index to enrich the method for calculating ecological water demand, providing a reference for resource regulation and the protection of aquatic organisms.

Suggested Citation

  • Zili Zhou & Yun Deng & Yong Li & Ruidong An, 2019. "The Ecological Water Demand of Schizothorax in Tibet Based on Habitat Area and Connectivity," IJERPH, MDPI, vol. 16(17), pages 1-19, August.
    • Handle: RePEc:gam:jijerp:v:16:y:2019:i:17:p:3045-:d:259850
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1660-4601/16/17/3045/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1660-4601/16/17/3045/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Hesham Abd-El Monsef & Scot Smith & Kamal Darwish, 2015. "Impacts of the Aswan High Dam After 50 Years," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 29(6), pages 1873-1885, April.
    Full references (including those not matched with items on IDEAS)

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Shaima A. Alnaqbi & Shamma Alasad & Haya Aljaghoub & Abdul Hai Alami & Mohammad Ali Abdelkareem & Abdul Ghani Olabi, 2022. "Applicability of Hydropower Generation and Pumped Hydro Energy Storage in the Middle East and North Africa," Energies, MDPI, vol. 15(7), pages 1-27, March.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jijerp:v:16:y:2019:i:17:p:3045-:d:259850. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.