A kind of computational methods of fish egg-laying season ecological water demand of rivers process

A kind of computational methods of fish egg-laying season ecological water demand of rivers process

  • CN 107,273,645 A
  • Filed: 07/25/2017
  • Published: 10/20/2017
  • Est. Priority Date: 07/25/2017
  • Status: Active Application
First Claim
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1. a kind of computational methods of fish egg-laying season ecological water demand of rivers process, it is characterised in that comprise the following steps;

  • The spawning habit of all fish in step 1, comprehensive analysis section, the spawning period is divided according to water temperature, generally according toThe spawning requirement of cold water fishes and warm warm nature fish, is divided into the 4-5 months, two spawning periods of the 6-7 months;

    Step 2,4-5 months suitable pulse flow are adjusted1.1 habitat suitability curvesUsing 1m as adhesive egg fish depth of water suitability degree curve maximum, 0.1m as meet fish spawning minimum depth,0.4-0.8m is the suitable depth of water, obtains producing adhesive egg fish egg-laying season depth of water suitability degree curve;

    And needed after adhesive egg output attachedThe hatching on pasture and water, cobble, it is necessary to which certain current keep water quality and nutrients conveying, but flow velocity is unsuitable excessive, therefore will0.1m/s-0.2m/s is as the suitable flow rate of adhesive egg fish egg-laying season habitat, and 0.5m/s is limit velocity, obtains producing stickinessOvum fish egg-laying season flow velocity suitability degree curve;

    1.2 egg-laying season appropriate flow ratesThe habitat suitability curve that step 1.1 is set up imports PHABSIM models, with 50m3/ s flow intervals simulation is in streamThe fish egg-laying season effectively perches ground area WUA changes under the conditions of amount is incremented by, and obtains effectively perching ground area and the change of flow is closedIt is curve;

    Step 3,6-7 months suitable pulse flow are adjusted2.1 habitat suitability curvesThe suitable depth of water for producing Drifting egg fish 6-7 months is defined as 1m-2m, the minimum critical depth of water is 0.2m, maximum criticalThe depth of water is 3m;

    Suitable flow rate is defined as 0.6-1.2m/s, ensures that the minimum critical flow velocity that fish-egg floating is not sunk to the bottom is 0.2m/s, examinesConsider fish and trace back ability, maximum critical flow velocity is set to 2m/s;

    The depth of water of production Drifting egg fish, flow velocity is obtained suitably to write musicLine;

    2.2 egg-laying season appropriate flow ratesThe habitat suitability curve that step 2.1 is set up imports PHABSIM models, equally with 50m3/ s flow intervals differenceSimulation fish egg-laying season under the conditions of flow is incremented by effectively perches ground area WUA changes, obtains producing Drifting egg fish in 6-7 monthsClass effectively perches the variation relation curve of ground area and flow.

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