Landscape design and formation of cascades on the peaks

Landscape design and formation of cascades on the peaks

Engineering and environmental organization of the upper catchment zone

Landscape design at the summit is not merely decorative. Its purpose is to create a stable relief structure, vegetation, waterways, wind corridors, fire breaks, and safe access zones.

It's impossible to simply create a beautiful park, a pond, or a system of continuous terraces on a mountaintop. Any change in topography affects several processes at once:

distribution of water between adjacent basins;

surface runoff velocity;

snow retention;

wind direction;

slope stability;

fire behavior;

spring feeding;

movement of people and animals.

The main principle:

The summit cascade must consistently slow down, distribute and safely convey water without turning the upper zone into a heavy reservoir or artificial dam.

1. The main functions of landscape architecture

A properly organized upper zone should:

preserve the natural watershed line;

reduce the concentration of runoff;

hold back the first volumes of rain;

maintain infiltration;

provide controlled overflow;

create protected landing zones;

reduce wind speed at the surface;

distribute snow;

keep fire escape routes open;

do not block emergency waterways;

provide technical access;

maintain biodiversity.

2. The principle of cascade

A cascade is a sequence of small independent elements that work from top to bottom.

Typical scheme:

ridge → microrelief → vegetation strip → microterrace → infiltration bowl → distribution overflow → upper trough → next slope level

Each element must:

take a limited amount;

not depend entirely on the neighboring element;

have a controlled overflow;

be resistant to local destruction;

do not transmit the shock flow downwards;

remain available for inspection.

3. Why you can’t create one large cascade

A single long rampart, a continuous terrace or a large upper reservoir can:

collect water from a large area;

change the natural watershed;

oversaturate the soil;

activate a landslide;

collapse at one point;

create a powerful breakthrough wave;

transfer water to a neighboring pool.

At the peaks the following are preferred:

small volumes;

short sections;

wide iridescence;

dispersed accumulation;

gradual decrease in energy.

4. Spatial zoning of the summit

Zone A. Ridge line

Purpose:

watershed preservation;

protection of thin soil layer;

reduction of wind erosion;

distribution of the first precipitation.

Acceptable elements:

mosaic low vegetation;

stone contour lines;

small rough areas;

narrow walking routes;

sensors;

low semi-permeable windscreens.

Undesirable:

deep ditches;

large trees;

reservoirs;

high embankments;

heavy structures.

Zone B. Upper transition strip

Situated slightly below the ridge line.

Here it is possible to create:

short micro-terraces;

stone crescents;

landing pockets;

shrub islands;

small snow-retaining elements;

mist eliminators;

biological restoration sites.

Zone C. Cascade sections

Intended for:

water slowdown;

sediment accumulation;

soil formation;

placement of shrubs and individual trees;

temporary water retention.

Each cascade section must have its own safe overflow.

Zone D. Upper troughs

They collect water after passing through cascades.

The following are being designed here:

riverbeds reinforced with vegetation;

sediment traps;

wide overflow areas;

checkpoints;

level sensors;

emergency water routes.

Zone E. Technical and fire circuit

Includes:

service road or trail;

fire breaks;

reservoirs;

turning areas;

connection points;

safe zones;

monitoring system.

5. Types of cascade elements

5.1 Stone contour lines

Low lines of local stone are placed approximately horizontally.

Functions:

slowing down of thin surface flow;

fine soil retention;

seed protection;

creating a wet strip;

formation of a microterrace over time.

Requirements:

low height;

absence of dam effect;

controlled intervals;

stable foundation;

use of local material.

5.2. Stone crescents

Used for individual plants or small groups.

Construction:

the open side faces the water inlet;

the lower part is reinforced;

there is a soil pocket inside;

The overflow is carried out through a lowered side part.

Suitable for:

shrubs;

pioneer plants;

local snow retention;

accumulation of organic matter.

5.3. Microterraces

Small areas created across the slope.

Main functions:

decrease in slope;

soil retention;

creation of a landing site;

short-term accumulation of water;

formation of a local microclimate.

A micro-terrace should not have a strictly horizontal closed surface without overflow.

5.4. Infiltration bowls

Shallow depressions that receive water from a small area.

The following can be placed inside:

large chips;

stone;

local organics;

biochar in limited quantities;

plants;

soil substrate.

The bowl should not be located:

on an active landslide;

above the road;

near the rocky edge;

above the building;

in the place of concentrated mudflow.

5.5. Stepped vegetation strips

Created from:

turf-forming grasses;

low shrubs;

ground cover plants;

flexible moisture-loving species in hollows.

They work as living hydraulic roughnesses.

5.6. Dry temporary pools

Used only on wide, stable peaks or plateaus.

They:

remain dry at normal times;

take water during heavy rain;

empty slowly;

have a wide emergency overflow.

Such objects require geological and hydrological calculations.

6. Cascade by height

The first level is precipitation reception

Elements:

vegetation cover;

mosses;

lichens;

stone mulch;

microroughness.

The second level is primary dispersion

Elements:

stone lines;

low shrub strips;

crescents.

The third level is temporary detention.

Elements:

microterrace;

planting cups;

organic pockets.

Level 4 - Controlled Overflow

Elements:

wide grassy drainage channels;

stone-vegetation areas;

side outlets.

The fifth level is the upper hollow

Elements:

reinforced riverbed;

sediment trap;

extension;

level sensor.

7. Water calculation of the cascade

For each element the following is determined:

catchment area;

estimated rainfall intensity;

expected volume;

filling speed;

working capacity;

emptying time;

overflow capacity;

possible volume of sediment;

clogging behavior.

The cascade should not be designed only for average rainfall.

Scripts needed:

normal rain;

heavy seasonal rain;

abnormal downpour;

repeated rainfall on saturated soil;

rain on snow;

downpour after the fire.

8. Cascade and abnormal downpour

In the event of an extreme event, the system should operate as follows:

the top elements fill up quickly;

water flows over the provided depressions;

the flow is distributed over a wide surface;

some of the sediment is retained;

the lower elements receive the stretched inflow;

Excess water drains away through an emergency route.

Invalid schema:

upper bowl → narrow pipe → steep outlet → unsupported slope

9. Cascade and wind

Landscape elements should take into account:

prevailing winds;

squalls;

snow transfer;

slanting rain;

wind erosion;

fire winds.

Low stone-plant elements can simultaneously:

retain water;

reduce surface wind;

collect snow;

hold the seeds.

But high, dense shafts and solid walls of shrubs create turbulence.

10. Cascade and snow

Each area of ​​snow accumulation becomes a future source of melt water.

Therefore, the snow diagram should show:

where the snow will be blown;

where it will accumulate;

how much water does it contain;

where will it go when it melts;

will it not overload the slope;

will it block the road?

will not form an avalanche pocket.

Cascades should distribute the snow, not collect it into one large mass.

11. Cascade and fog

On ridges, the cascade structure can enhance the capture of horizontal precipitation.

Suitable elements:

shrub islands;

mist eliminator meshes;

mosses;

rough stone surfaces;

low planting cups;

leeward wet pockets.

The collected water is sent to:

to the roots;

into the soil;

in closed tanks;

to the next element of the cascade.

12. Plant composition

The landscape structure is formed from the low to the high tier.

On the ridge line

mosses;

lichens;

low grasses;

cushion plants;

creeping shrubs.

Below the ridge

turf-forming grasses;

mixed grass;

shrub islands;

local pioneer plants.

On stable cascades

tall shrubs;

individual low trees;

plants for pollinators;

nitrogen-fixing species in limited quantities.

In the hollows

sedges;

moisture-loving herbs;

flexible bushes along the edges;

open water path in the center.

13. Mosaic design

The mosaic should include:

dry open areas;

wet pockets;

shrub groups;

grass strips;

stone zones;

fire breaks;

ecological transitions;

technical passages.

Advantages:

reduction of fire continuity;

windfall resistance;

different conditions for species;

uneven snow melting;

gradual distribution of water;

maintaining visibility and access.

14. Landscape and fire resistance

The cascade should not become a continuous fuel corridor.

Necessary:

divide shrub groups;

maintain low grass strips;

remove dry biomass;

provide access;

create fire water points;

do not plant continuous lines of conifers;

preserve mineralized areas only where they are hydrologically safe.

15. Fire water cascades

Part of the cascade system can perform a fire protection function.

Possible elements:

closed tanks;

small technical storage devices;

fire ponds below the ridge;

connection points;

gravity lines;

sites for drones and ground vehicles.

Open water at the summit requires caution due to:

evaporation;

wind wave;

icing;

risk of overflow;

soil loads.

16. Roads and trails in the cascade

Routes must be included in the general water scheme.

The right way:

does not conduct water along the ridge;

regularly loses small amounts of weight;

has reinforced transverse releases;

does not cross the collection bowl;

maintains emergency overflow;

does not block the snow and fire corridor.

The trail should:

avoid the line of maximum slope;

do not walk on a wet pocket;

have a transverse slope;

regularly break the potential flow.

17. Recreation areas and observation decks

Recreational elements are permitted only after hydrological and fire analysis.

The site must not be located:

on the emergency water route;

under the snow cornice;

in a saddle with a strong wind;

on the landslide edge;

in a fire dead end;

over an unstable slope.

The coating must be:

water-permeable;

erosion resistant;

non-combustible or low-flammable;

not creating a long drain.

18. Using local stone

Advantages:

minimal transportation;

conformity with the landscape;

high durability;

thermal inertia;

creation of microclimate;

support for mosses and lichens.

The stone cannot:

take from active channels without evaluation;

stack on an unstable slope;

use as a solid dam;

place without a stable foundation.

19. Working with excavated soil

The soil from the formation of micro-terraces is used:

within the same area;

to strengthen the bottom edge;

to fill erosion gullies;

for landing pockets;

to restore old tracks.

It is not allowed:

throw down a slope;

store in a hollow;

overload the edge with it;

leave loose before the rainy season.

20. Soil pockets

A soil pocket is created in a stable depression and may include:

local soil;

small stone;

plant residues;

wood chips;

biochar in small doses;

mycorrhizal preparation;

seeds of local plants.

The pocket should:

have an overflow;

do not over-water;

be protected from blowing;

do not block the main drain.

21. Biochar and organic materials

Biochar can:

retain moisture;

increase sorption;

serve as a microbial carrier.

But it cannot be introduced without control.

Required:

small doses;

pre-saturation;

mixing with soil;

pH check;

blowout protection;

absence of contaminants.

A thick layer of dry organic matter increases the fire load.

22. Digital design

Before excavation work begins, a digital model is created.

It includes:

DTM;

slopes;

curvature;

micro-catchments;

flow directions;

accumulation zones;

wind map;

snow map;

fire map;

vegetation;

roads;

springs;

emergency routes.

DREVO AeroSense Drone is used for:

original scan;

cascade markings;

volume control;

post-construction inspections;

comparisons after showers.

23. Digital passport of the cascade element

Each element receives:

code;

coordinates;

type;

catchment area;

working volume;

height;

width;

material;

vegetation;

overflow;

emergency route;

date of construction;

state;

date of inspection;

responsible;

photographs;

history of damage.

24. Pilot cascade

The first pilot should be created in a small, stable area.

It should include:

control untreated area;

stone lines;

microterrace;

landing pockets;

vegetation strip;

measuring overflow;

humidity sensors;

photo points;

drone scanning;

lower sediment trap.

This will allow us to compare the actual effectiveness.

25. Implementation stages

Stage 1. Diagnostics

geodesy;

hydrology;

soils;

geology;

wind;

snow;

fire risk.

Stage 2. Site protection

grazing restrictions;

closure of unnecessary roads;

removal of hazardous influences.

Stage 3. Markup

All elements are transferred from the digital model to the terrain.

Stage 4. Construction in small sections

Only the area that can be immediately stabilized is exposed.

Stage 5. Soil restoration

organics;

turf;

soil pockets;

surface protection.

Stage 6. Landing

First low species, then shrubs and only then trees.

Step 7. Water testing

Small controlled volumes or observation of the first rain are used.

Stage 8. Monitoring

sensors;

drone;

ground inspections;

sediment control.

Step 9. Adjustment

Ineffective elements are rebuilt.

26. Performance indicators

27. Typical summit diagram

Central line

Low vegetation and minimal disturbance.

First side stripe

Rock lines and soil pockets.

Second lane

Micro-terraces and shrub islands.

Third lane

Infiltration bowls and individual low trees.

Upper ravine

Open fortified waterway.

Technical outline

Road, sensors, fire tank and emergency access.

28. What not to do

It is forbidden:

level the summit with heavy equipment;

create a large reservoir on thin soil;

build one continuous terrace;

completely block surface runoff;

direct all overflows to one point;

place the cascade on an active landslide;

plant a dense row of tall trees;

create a continuous bush fire corridor;

use the road as the main drainage channel;

leave loose soil before a downpour;

build a cascade without an emergency route;

focus only on appearance.

The final principle

The landscape design of the summit should not create a decorative park, but a living engineering system.

A correctly formed cascade:

starts with low vegetation;

distributes water into small independent elements;

creates the soil;

protects from the wind;

holds snow;

maintains foggy moisture;

reduces fire continuity;

keeps emergency routes open;

safely transfers excess to lower levels.

A well-designed cascade at the summit is almost invisible as a separate structure. It appears like natural relief, but functions as a precisely orchestrated system of water, soil, vegetation, and safety.