Matsya Purana — Description of Atri’s Hermitage: Sacred Grove Planning
प्रणालिकानि चोष्णानि शीतलानि च भागशः कन्दराणि च शैलस्य सुसेव्यानि पदे पदे //
praṇālikāni coṣṇāni śītalāni ca bhāgaśaḥ kandarāṇi ca śailasya susevyāni pade pade //
There should be water-channels—some warm and some cool—arranged in due proportion; and the mountain’s caves and grottoes should be made pleasant and serviceable at every step along the paths.
This verse is not about Pralaya; it focuses on practical Vastu-style site planning—especially arranging water-courses and making natural features like caves usable.
It reflects the duty to create habitable, healthful, and orderly environments—by managing water, pathways, and shelters—an aspect of righteous governance and responsible household/estate planning.
Architecturally, it recommends planned drainage/water-channel systems (praṇālikā) and the enhancement of natural mountain features (kandarā) so the site remains comfortable and accessible throughout.