CN-121978931-A - Construction method of hydro-fluctuation belt Sang Dou interaction system based on hydrologic rhythm

CN121978931ACN 121978931 ACN121978931 ACN 121978931ACN-121978931-A

Abstract

The invention relates to the technical field of hydro-fluctuation belts and water and soil conservation, in particular to a hydro-fluctuation belt Sang Dou interaction system construction method based on a hydrologic rhythm. The method comprises the steps of constructing a gradient parameter set of the water level change rate, sequentially driving region mode division, step sequence cooperative execution and self-adaptive optimization feedback, wherein gradient parameters are generated based on measured data of a mechanical water level gauge along a height Cheng Bushe, a region threshold is dynamically set in combination with a soil type label, the mode switching reliability is ensured through upstream and downstream physical cooperative verification, a trans-regional operation time sequence is woven according to the gradient direction and a numerical value, and finally an execution effect is fed back to the gradient parameter reconstruction to form closed loop regulation. The invention provides a hydro-fluctuation belt Sang Dou interaction system construction method based on a hydrological rhythm, which solves or at least reduces the problems of regional response mismatch, high system breakdown rate and step blockage caused by single-point water level triggering global synchronous operation in the prior art.

Inventors

LI YUYING
XIN XIAOKANG
CHEN ZETAO
WANG CHAO
WU YIFENG
ZHANG LONGCHONG
CHANG WEI
LEI SHUANG
GUO MINLI
WANG HAN
LV SHUGUANG
WANG RONGXIN
XU MENGZHEN
ZHANG YEPING
WANG YUNJI
WANG JIAMING
LIU ZHANYU

Assignees

南阳师范学院
河南洁达环保投资有限公司
浙江大学中原研究院

Dates

Publication Date: 20260505
Application Date: 20260123

Claims (10)

1. The construction method of the hydro-fluctuation belt Sang Dou interaction system based on the hydrologic rhythm is characterized by comprising the following steps of: S1, dynamically constructing a water level change rate gradient parameter set, namely arranging water level monitoring nodes along the elevation gradient of the hydro-fluctuation belt, dividing the water level change rate difference value of adjacent nodes in the same time window by the node spacing to generate gradient parameters, and synchronously associating soil type identification information; S2, region mode division driven by gradient parameters, namely setting a dynamic division threshold according to the gradient parameters and soil types, dividing the region into a far water region, a near water region and a non-point source pollution interception region, and confirming the mode switching effectiveness by verifying the continuity and the direction consistency of the gradient parameters of the upstream region and the downstream region; s3, constructing an ecological ditch micro-wetland system guided by gradient parameters, namely dynamically setting ecological ditch construction parameters according to a regional mode, executing construction, directionally coordinating cross-regional construction time sequence according to the gradient parameters, and compressing upstream and downstream construction time difference during gradient mutation; And S4, self-adaptive optimization of gradient parameter feedback, namely monitoring gradient parameters and ecological ditch operation effect data in real time, adjusting ecological ditch structure parameters when the gradient is suddenly changed, and optimizing a follow-up gradient parameter set construction logic based on pollutant interception effect differences.
2. The method according to claim 1, wherein the dynamic partitioning threshold of step S2 is specifically: When the gradient parameter is larger than a first preset threshold value, the upstream area is marked into a far water area, and the downstream area is marked into a near water area; if the area is marked as a history flood frequent area, the section gradient threshold value is downwards adjusted to a second preset threshold value; if the area is located within a preset distance range from the land boundary, a non-point source pollution interception area is marked in; When the regional hydrologic conditions change to cause the gradient parameters to change, the regional mode is correspondingly and dynamically adjusted.
3. The method of claim 2, wherein when a region triggers a mode switch command due to the gradient parameter exceeding a threshold, it is verified whether the gradient parameter variation trends of the adjacent regions upstream and downstream in the same time window are continuous and consistent, and if the gradient parameters of the adjacent regions are opposite, the original mode is maintained.
4. The method according to claim 1, wherein the dynamically setting of the ecological ditch construction parameters according to the regional mode in step S3 is specifically: when the area is divided into a long-water area, setting the depth parameter of the ecological ditch to be 110-130 cm and the width parameter to be 90-110 cm, setting a purifying substrate at the bottom of the ecological ditch, planting water-resistant plants in the ecological ditch, intercropping mulberry beans at two sides of the ecological ditch, and adopting drought-resistant waterlogging-resistant leguminous grass seeds; when the area is divided into a near-water area, setting the depth parameter of the ecological ditch to be 80-100 cm and the width parameter to be 90-110 cm, setting a purifying substrate at the bottom of the ecological ditch, planting water-tolerant plants in the ecological ditch, intercropping mulberry beans at two sides of the ecological ditch, and adopting drought-tolerant waterlogging-tolerant leguminous grass seeds; When the area is divided into a non-point source pollution interception area, setting the depth parameter of the ecological ditch to be 130-150 cm and the width parameter to be 120-140 cm, arranging a purification substrate at the bottom of the ecological ditch, adding a high-efficiency adsorption material proportion into the purification substrate, planting water-resistant plants in the ecological ditch, intercropping mulberry beans at two sides of the ecological ditch, and adopting drought-resistant waterlogging-resistant leguminous grass seeds; When the regional mode is changed, the function conversion is realized by adjusting the parameters of the existing ecological ditch, and the function conversion is not reconstructed; and when the gradient parameter is larger than a third preset threshold value, slope protection reinforcement parameters are added in the ecological ditch sequence of the upstream area.
5. The method of claim 4, wherein the ecological ditch is an adjustable parameter structure, and when the regional mode is changed, parameter adjustment is achieved by: Adding or reducing a purifying basal layer on the basis of the existing ecological ditch; the ecological ditch depth is adjusted by heightening or lowering ditch walls; the purge substrate material is replaced or replenished to accommodate new functional requirements.
6. The method according to claim 4, wherein the step S3 is to directionally coordinate the cross-region construction timing according to the gradient parameters, specifically: In a negative gradient field formed by continuous water level drop, immediately triggering a vegetation planting step in a downstream area after the ecological ditch construction step is completed in the upstream area; When gradient parameters of adjacent sections are suddenly changed, the construction time difference of the upstream region and the downstream region is compressed.
7. The method according to claim 1, wherein the step S4 specifically includes: synchronously implementing ecological ditch construction and vegetation planting at each operation point, and collecting ecological ditch operation parameters through a water quality monitor and a flowmeter; and when unexpected mutation of the gradient parameters is detected, adjusting the structural parameters of the ecological ditch in the mutation section.
8. The method of claim 7, wherein adjusting the parameters of the ecological ditch structure comprises increasing the depth of the ecological ditch in the abrupt change section, enlarging the width of the ecological ditch or adding a temporary purifying unit in the ecological ditch, wherein the temporary purifying unit is formed by filling a degradable fiber mesh bag with a biochar and zeolite mixed material.
9. The method according to claim 7, wherein the step S4 further comprises: recording pollutant interception efficiency and water quality purification data after key steps; when the pollutant interception effect difference of the upstream area and the downstream area exceeds a preset threshold, adjusting the ecological ditch parameter set value of the corresponding area in the subsequent gradient parameter set construction, and carrying out parameter optimization on the existing ecological ditch.
10. The method according to claim 4, wherein the drought-tolerant waterlogging-tolerant bean species is leguminous plants with dual adaptability, i.e. capable of normal growth and maintaining nitrogen fixation under drought stress and short-term flooding conditions, and all operations are limited to be performed within a dry-out window published by a reservoir schedule.

Description

Construction method of hydro-fluctuation belt Sang Dou interaction system based on hydrologic rhythm Technical Field The invention relates to the technical field of hydro-fluctuation belts and water and soil conservation, in particular to a hydro-fluctuation belt Sang Dou interaction system construction method based on a hydrologic rhythm. Background The hydro-fluctuation belt is used as a special ecological staggered belt formed by periodic fluctuation of water level in the running process of the reservoir, and the cooperative utilization of ecological restoration and agricultural utilization of the hydro-fluctuation belt becomes a key subject in the crossing field of ecological hydraulic engineering and sustainable agriculture. In recent years, sang Dou interaction systems are widely explored and applied to the reconstruction practice of vegetation in a hydro-fluctuation belt because of the water and soil conservation function, the biological diversity improving potential and the economic output value. The system can effectively relieve multiple ecological pressures such as soil erosion, nutrient loss, vegetation coverage deficiency and the like of the hydro-fluctuation belt theoretically through a complementary mechanism of soil fixation of deep roots of the mulberry and nitrogen fixation of shallow roots of the beans. Although the ecological logic is clear, the practical problems of poor system stability and weak regional adaptability are faced when engineering construction is actually carried out. Particularly in large-scale reservoir hydro-fluctuation belts with large relief and complex hydrologic conditions, the expected effect is difficult to achieve by using the traditional construction method. The current technology is mainly in the context of local microenvironment improvement or static structure optimization. For example, the patent CN111771632B discloses a method of excavating an inclined planting groove in a dead water period and supporting the groove by gabion columns, so that the anti-scouring capability of plants can be enhanced, while the patent CN113767798B discloses a method of improving the rhizosphere microenvironment by a multi-layer nutrient matrix and ecological concrete composite structure in a plant growth hole. These approaches do increase the survival rate of a single point under specific homogenization or gentle slope conditions. However, their design logic is basically based on the premise of "uniform hydrologic process space" or "fixed work schedule presets". Specifically, the method generally uses a single water level monitoring point to judge the dynamic state of the whole hydro-fluctuation belt, simplifies the hydrologic rhythm under complex elevation gradient into a unified response signal in the time dimension, and then prepares the agricultural operation sequence with the same universe. On the basis, the vegetation configuration, the soil treatment and the sowing time are all standardized processes, and a dynamic sensing and differential response mechanism for spatial heterogeneity is lacking. However, as reservoirs are scheduled finer and finer, so too are extreme hydrologic events, and the spatial non-uniformity of hydro-fluctuation belt hydrologic rhythms becomes more and more apparent, the inherent problems of these technological paths are also slowly exposed. The water level change rate is very different in gradient, namely, the water withdrawal rate can reach more than 0.6 m/h in the upstream steep slope area due to the large gradient and the rapid water drainage, and the downstream gentle area can only be 0.2-0.3 m/h. The spatial diversity of the physical process directly leads to the phenomenon of execution dislocation that the upstream is in drought stress stage and the downstream is still in flooding state. Under the background, if the logic of single-point water level triggering global operation is still adopted, soil moisture loss and beans cannot emerge in the upstream area due to early exposure, meanwhile, root systems are choked in the downstream area due to too late drainage, and systematic breakdown is finally caused. The measured data show that such region response mismatch can result in an upstream region system breakdown rate as high as 52.1%, and a downstream of only 23.4%, with an overall difference of 28.7%. Furthermore, the gradient sensitive area (such as sandy soil steep slope) is easy to be washed out at the surface layer under the high water withdrawal rate due to weak water holding capacity and poor corrosion resistance, so that bean seeds are lost or seedlings are dehydrated and die, and the emergence rate is obviously lower than that of the clay gentle slope area. In addition, because the operation steps of each area lack cooperative logic based on hydrologic gradients, key agronomic links (such as soil moisture conservation, seeding and reinforcement) are often blocked by unmatched upstream and downstream states, so that an execution disl