From 081422967d5c523740f4eceb3482a7b6b8358fdc Mon Sep 17 00:00:00 2001
From: "mathias.chouet" <mathias.chouet@irstea.fr>
Date: Thu, 2 Jan 2020 16:15:22 +0100
Subject: [PATCH] Translate doc for blocks concentration

---
 docs-en/calculators/pam/concentration.md | 20 ++++++++++++++++++++
 docs-en/calculators/pam/macrorugo.md     |  2 +-
 2 files changed, 21 insertions(+), 1 deletion(-)
 create mode 100644 docs-en/calculators/pam/concentration.md

diff --git a/docs-en/calculators/pam/concentration.md b/docs-en/calculators/pam/concentration.md
new file mode 100644
index 000000000..372c6b12d
--- /dev/null
+++ b/docs-en/calculators/pam/concentration.md
@@ -0,0 +1,20 @@
+# Blocks concentration
+
+This module makes it possible to calculate the concentration of uniformly distributed blocks in a rock-ramp fish pass.
+
+It allows to calculate one of the following values:
+
+- The width of the pass (m)&nbsp;;
+- The number of blocks&nbsp;;
+- The diameter of the blocks (m)&nbsp;;
+- The concentration of the blocks \(C\).
+
+## Formula
+
+The formula is detailed in the [rock-ramp fish pass](./macrorugo.md) documentation.
+
+## Harmonization
+
+When calculating the number of blocks, if it is not an integer, upward and downward harmonized numbers of blocks are given along with corresponding concentration values.
+
+Tolerance is of the order of a centimetre.
diff --git a/docs-en/calculators/pam/macrorugo.md b/docs-en/calculators/pam/macrorugo.md
index 505680136..bcd90f51e 100644
--- a/docs-en/calculators/pam/macrorugo.md
+++ b/docs-en/calculators/pam/macrorugo.md
@@ -1,6 +1,6 @@
 # Rock-ramp fishpasses
 
-The rock-ramp fishpass calculation module makes it possible to calculate the characteristics of a rock-ramp pass made up of uniformly distributed blocks with equal transverse \(ay\) and longitudinal \(ay\) spacings.
+The rock-ramp fishpass calculation module makes it possible to calculate the characteristics of a rock-ramp pass made up of uniformly distributed blocks with equal transverse \(ax\) and longitudinal \(ay\) spacings.
 
 ![Schematic of a regular arrangement of rockfill and notations](pam_schema_enrochement_regulier.png)
 
-- 
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